Airfoil
Audio Hijack
Farrago
Fission
Loopback
Piezo
SoundSource
Loopback 2.4.8Full MacOS 26 Support
Released on November 3, 2025
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ARK Plugin Updated to 12.3.4
The ARK plugin which powers Loopback’s audio handling has been updated to version 12.3.4. This update provides support for high-quality USB audio with AirPods Max (USB-C) headphones and several fixes for MacOS 26 (Tahoe), as well as backend improvements to keep audio flowing smoothly. -
Full Support for MacOS 26 (Tahoe)
Loopback now offers full support for MacOS 26 (Tahoe), with no known incompatibilities. Note that MacOS 26.1 or higher is recommended in the strongest possible terms. -
Loopback now supports capturing audio from the new “Phone” app in MacOS 26 (Tahoe).
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Work has been done to enable DriverKit-based USB devices which lack unique serial numbers to work as expected on MacOS 26 (Tahoe).
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Loopback's virtual audio devices now work correctly with the screen recording capabilities within MacOS 26 (Tahoe).
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An OS bug in MacOS 26 (Tahoe) could previously cause capture of audio from the “AirPlay System Receiver” special source to fail. We’re now working around that issue, and capture should work in all circumstances.
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The “Debugging” window now contains a helpful link to a support article.
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Loopback 2.4.8 Is for MacOS 14.5 and Higher
This variant of Loopback supports MacOS 14.5 and higher. On MacOS 11 through 14.4.1, a different variant is automatically used, with no action required on your part.
Loopback 2.4.7Initial MacOS 26 Support
Released on September 4, 2025
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Initial Support for MacOS 26 (Tahoe)
Loopback now has initial support for MacOS 26 (Tahoe), and will no longer warn at launch. However, there are currently two known issues with Tahoe which can result in lost audio.• Known issue with sample rate mismatches: If an application is playing audio to an external device whose sample rate does not match that of the system’s default output device, attempting to capture it will fail.
• Known issue with lost audio from FaceTime and Phone: Attempting to capture audio from FaceTime or the new Phone app fails in certain setups.
With each of these bugs, silence will be heard, rather than the expected audio. Find more details, including workarounds, in our support article.
These bugs need to be corrected by Apple, in a future MacOS update. As such, you may wish to consider delaying your upgrade to Tahoe until a later date.
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New “Notification Center” Special Source
On MacOS 15 (Sequoia) and higher, the new “Notification Center” special source captures other audio which plays through the system’s Notification Center, such as alarm sounds produced by MacOS’s “Clock” app. -
ARK Plugin Updated to 12.2.9
The ARK plugin, which powers Loopback’s audio handling, has been updated to version 12.2.9. This updates fixes a rare memory leak, and makes other improvements to audio handling. -
Loopback now works around issues with several apps that don’t properly handle virtual devices, including WhatsApp. With this change, Loopback’s virtual devices will now correctly be selectable as an input source within WhatsApp.
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Sample rate changes for virtual devices are now properly saved and restored across restarts.
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Audio from the system’s capture is now prevented from incorrectly participating in play-through actions.
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Loopback 2.4.7 Is for MacOS 14.5 and Higher
This variant of Loopback supports MacOS 14.5 and higher. On MacOS 11 through 14.4.1, a different variant is automatically used, with no action required on your part.
Loopback 2.4.6
Released on April 29, 2025
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ARK Plugin Updated to 12.2.3
The ARK plugin, which powers Loopback’s audio handling, has been updated to version 12.2.3, with several small improvements. The update prevents distortion from occurring due to sample rate mismatches. In addition, multiple rare “ECIO” crashes have been fixed, and an OS-related crash which could occur when installing or updating the ARK plugin has been worked around. -
New “Spoken Content” Special Source
On MacOS 15 (Sequoia), the new “Spoken Content” special source replaces the previous “Text to Speech” special source. It captures audio from the “Accessibility” settings “Spoken Content” area, as well as from apps which play text-to-speech audio via the system (triggered by the “Start Speaking” command in the “Speech” menu). -
Output channel meters now correctly reflect volume changes from the source tiles feeding them.
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Nested devices now correctly pass their mute and volume states to the parent device.
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When adjusting volume on Sources and Monitors, changes will be heard immediately, rather than after the drag has been completed.
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A language improvement has been made to VoiceOver, to follow Apple in using “VO-Space bar”, rather than “VO-press”.
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Loopback’s “About” box has been updated with a new design.
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Loopback 2.4.6 Is for MacOS 14.5 and Higher
This variant of Loopback supports MacOS 14.5 and higher. On MacOS 11 through 14.4.1, a different variant is automatically used, with no action required on your part.
Loopback 2.4.5
Released on November 20, 2024
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ARK Plugin Updated to 12.0.9
The ARK plugin, which powers Loopback’s audio handling, has been updated to version 12.0.9, with many optimizations and improvements to audio handling. -
Issues where sample rate conversions could cause distorted audio have been rectified.
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When a device is missing from the system, its volume sliders in the “Sources” and “Monitors” column will now be dimmed.
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Source meters will now correctly activate, even when a source is not hooked up to any output.
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Loopback 2.4.5 Is for MacOS 14.5 and Higher
This variant of Loopback supports MacOS 14.5 and higher. On MacOS 11 through 14.4.1, a different variant is automatically used, with no action required on your part.
Loopback 2.4.4Full Support for MacOS 15
Released on November 7, 2024
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Full Support for MacOS 15 (Sequoia)
Loopback now offers full support for MacOS 15 (Sequoia), with no known incompatibilities. -
ARK Plugin Updated to 12.0.8
The ARK plugin, which powers Loopback’s audio handling, has been updated to version 12.0.8, with many optimizations and improvements to audio handling. -
When missing audio devices are reconnected, they will now immediately receive audio.
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When a Loopback virtual audio device is set as the default system output, user interface sounds or other short audio clips will no longer be slightly cut off.
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Monitoring startup has been improved to prevent small bursts of unmuted audio from unexpectedly popping through.
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A bug where Loopback could mute all channels of a multi-channel device while running has been squashed.
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Cross-compatibility with SoundSource has been improved, particularly with regard to SoundSource’s ability to redirect audio to a Loopback virtual audio device.
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Loopback virtual audio devices now work better with Audio Hijack, behaving like standard audio hardware in all known ways.
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Loopback now properly updates when changes are made to the channel or sub-device configuration of an aggregate device being used as an input source or an output monitor.
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In some cases, meters could fail to work properly immediately after an update to the ARK plugin. No longer!
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Meters in Loopback have been improved to feel more responsive and update faster.
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The “Finder” special source will no longer incorrectly receive audio when previewing inside another app’s “Open” dialog.
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A rare crash when using devices with mismatched sample rates has been fixed.
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VoiceOver will now correctly identify volume sliders as sliders.
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Multiple drawing bugs have been fixed, including problems where wires might display incorrectly after adjusting window size, as well as unchecked checkboxes on disabled sources drawing incorrectly.
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The license unlock sound now plays via the “systemsoundserverd” process, which correctly respects the system’s alert volume and device preference.
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Loopback 2.4.4 Is for MacOS 14.5 and Higher
This variant of Loopback supports MacOS 14.5 and higher. On MacOS 11 through 14.4.1, a different variant is automatically used, with no action required on your part.
Loopback 2.4.3
Released on August 6, 2024
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Preliminary Support for MacOS 15 (Sequoia) Betas
Loopback will now run on MacOS 15 (Sequoia). There are no known issues on Sequoia at present, but do note that the OS betas remain in flux. To avoid problems, we always encourage users to stick with Apple’s official (non-beta) OS releases. -
ARK Plugin Updated to 12.0.3
The ARK plugin has been updated to version 12.0.3, providing preliminary compatibility with MacOS 15 (Sequoia) for Loopback. -
The name of the “Background Sound” special source has been corrected to “Background Sounds”.
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Loopback 2.4.3 Is for MacOS 14.5 and Higher
This variant of Loopback supports MacOS 14.5 and higher. On MacOS 11 through 14.4.1, a different variant is automatically used, with no action required on your part.
Loopback 2.4.2
Released on July 18, 2024
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Return of the “Text to Speech” Special Source
The “Text to Speech” special source has returned, to capture from apps which do not play text-to-speech audio (triggered by the “Start Speaking” command in the “Speech” menu) via their own process. -
Improvements to Special Sources
The “Siri” special source now correctly includes sound effects on MacOS 14 (Sonoma), and the “VoiceOver” special source has been optimized to capture only necessary processes. -
The “Pass-Thru” source has been optimized to improve overall performance.
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The level meter seen in the app’s “Devices” sidebar is now more accurate.
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An incompatibility with Boinx Software’s “mimoLive” has been fixed.
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Loopback now uses improved heuristics to confirm the ARK plugin is loaded correctly, avoiding a rare “Repair needed” warning. This also improves reliability between Loopback and Audio Hijack, when an Audio Hijack session is set to automatically run on login.
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Audio capture has been improved in certain situations, to avoid instances where it might silently fail.
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ARK Plugin Updated to 12.0.2
The ARK plugin has been updated to version 12.0.2, fixing multiple small issues to improve the overall experience of using Loopback. -
Loopback 2.4.2 Is for MacOS 14.5 and Higher
This variant of Loopback supports MacOS 14.5 and higher. On MacOS 11 through 14.4.1, a different variant is automatically used, with no action required on your part.
Loopback 2.4.1
Released on June 27, 2024
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Possible Issues With Distorted Audio Have Been Corrected
A problem where audio captured by Loopback could get choppy or distorted has been corrected. This fixes a regression introduced in version 2.4.0, as part of the overhauled audio capture backend. -
Loopback Again Correctly Captures From All Applications
Audio is now correctly captured from applications that are playing to audio devices other than the default system audio output. This fixes a regression introduced in version 2.4.0, as part of the overhauled audio capture backend. -
CPU Usage Optimizations
Loopback’s CPU usage has been optimized both when adjusting volumes and when the app is idle. This fixes regressions introduced in version 2.4.0, as part of the overhauled audio capture backend. -
An issue where pass-thru (output) volume could fail to be applied has been corrected. This fixes a regression introduced in version 2.4.0, as part of the overhauled audio capture backend.
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Previously, audio meters could go missing for some channels in configurations with virtual device sources. They have been found, and convinced to appear correctly at all times.
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Loopback will no longer unexpectedly impact VoiceOver audio when installing or updating Loopback. As well, an issue with poor VoiceOver responsiveness within Loopback has also been fixed.
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An issue where monitor volume controls were not properly highlighted has been corrected.
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A minor display issue with Monitor Channels 1 & 2, where the “(R)” could be cut off, has been corrected.
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ARK Plugin Updated to 12.0.1
The ARK plugin has been updated to version 12.0.1, fixing several small issues. -
MacOS 15 (Sequoia) is not yet supported, but Loopback now behaves better on it. Updates with support for Sequoia are still in the works, and will arrive later this summer.
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Improvements have been made to Loopback’s updating process, to avoid issues when a Loopback virtual audio device is in use by other apps.
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Improvements have been made to Loopback’s debug logging.
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Loopback 2.4.1 Is for MacOS 14.5 and Higher
This variant of Loopback supports MacOS 14.5 and higher. On MacOS 11 through 14.4.1, a different variant is automatically used, with no action required on your part.
Loopback 2.4.0Requires MacOS 14.5 or Higher
Released on June 5, 2024
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A Powerful New Audio Capture Backend
Loopback now uses a new audio capture backend called Audio Routing Kit (ARK), as well as a new ARK plugin, for all audio handling. Thanks to ARK and the ARK plugin, Loopback can be set up on a new Mac in seconds, with no restarts nor configuration changes necessary. -
New “Permissions” Window
Loopback now includes a new “Permissions” window, to handle installation of the ARK plugin, as well as enabling of the “System Audio Access” and “Microphone Access” permissions. These permissions enable you to use Loopback to control audio from applications you specify. -
Erroneous Microphone-In-Use Indicators, Begone!
Previously, when Loopback was playing audio to a device that also has input channels, or capturing from any application on MacOS 14.2 and higher, MacOS would erroneously display its orange microphone-in-use indicator. With changes to Loopback’s audio capture backend, that is no longer the case, and we’re very glad about it. -
All monitors in Loopback devices now provide volume controls, including audio hardware without direct volume and mute support
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If you’re running the latest version of Loopback when you check for an update, the resulting information screen now provides a helpful “View Release Notes” button.
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The “Siri” special source has been updated to work as expected on all releases of MacOS 14 (Sonoma).
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A resource leak which could cause the `coreaudiod` process to use large amounts of memory in rare situations has been fixed.
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The “Sources” menu has been updated to alphabetize using the on-disk name, which ensures apps like “Ableton Live” appear where you’d expect.
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A minor display issue with Output Channels 1 & 2, where the “(R)” could be cut off, has been corrected.
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VoiceOver now uses correct names for all special sources in Loopback.
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Using the “Factory Reset” option in the “Debugging” window now correctly visually updates the “Hidden Settings” section.
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A new “Uninstall ARK Plugin…” button is now available from the “Debugging” window, to force the removal of the ARK plugin that powers Loopback’s audio capture. As well, the “Uninstall ACE…” button will now only appear in the “Debugging” window if ACE is currently installed.
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The “Loopback” menu now includes an “Uninstall Loopback” option, which will delete Loopback’s virtual devices from your Mac and remove its backend components, after which you can delete Loopback.
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Loopback now includes an automated re-downloader, to ensure you have the proper variant for your MacOS version.
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Loopback’s “Quick Tour” now includes a friendly new introductory screen. The Quick Tour is shown at first launch, or by selecting it from the “Help” menu.
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Loopback’s “About” box now shows the details about the audio engine it’s using.
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The “ACE: Prioritize reliability over latency” hidden setting is no longer relevant, and has been removed from the “Debugging” window.
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Loopback 2.4.0 Is for MacOS 14.5 and Higher
This variant of Loopback supports MacOS 14.5 and higher. On MacOS 11 through 14.4.1, a different variant is automatically used, with no action required on your part.
Loopback 2.3.5For MacOS 11 through MacOS 14.4.1
Released on August 19, 2025
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This update features small improvements and adjustments to keep Loopback working smoothly.
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Loopback 2.3.5 Is for MacOS 11 through MacOS 14.4.1
This variant of Loopback supports MacOS 11 through MacOS 14.4.1. On MacOS 14.4 and higher, a different variant is automatically used, with no action required on your part.
Loopback 2.3.4
Released on June 4, 2025
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Improvements to Special Sources
The “Siri” special source now correctly includes sound effects on MacOS 14 (Sonoma), and the “VoiceOver” special source has been optimized to capture only necessary processes. -
Additional changes have been made so that the “Siri” special source works as expected on MacOS 14 (Sonoma).
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The name of the “Background Sound” special source has been corrected to “Background Sounds”.
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Loopback 2.3.4 Is for MacOS 11 through MacOS 14.4.1
This variant of Loopback supports MacOS 11 through MacOS 14.4.1. On MacOS 14.5 and higher, a different variant is automatically used, with no action required on your part.
Loopback 2.3.3
Released on June 5, 2024
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The “Siri” special source has been updated to work as expected on all releases of MacOS 14 (Sonoma).
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The “Sources” menu has been updated to alphabetize using the on-disk name, which ensures apps like “Ableton Live” appear where you’d expect.
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A minor display issue with Output Channels 1 & 2, where the “(R)” could be cut off, has been corrected.
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VoiceOver now uses correct names for all special sources in Loopback.
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Loopback now includes an automated re-downloader, to ensure you have the proper variant for your MacOS version.
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Loopback’s “About” box now shows the details about the audio engine it’s using.
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Loopback 2.3.3 Is for MacOS 11 through MacOS 14.4.1
This variant of Loopback supports MacOS 11 through MacOS 14.4.1. On MacOS 14.5 and higher, a different variant is automatically used, with no action required on your part.
Loopback 2.3.2Full Support for MacOS 14
Released on October 18, 2023
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Full Support for MacOS 14 (Sonoma)
Loopback now has full compatibility with MacOS 14 (Sonoma), with no known issues. -
Improvements in ACE 11.9.6
The Audio Capture Engine (ACE) has been updated to 11.9.6, with improvements for even more reliable audio capture. -
Loopback will now launch and run as expected on MacOS 14.1.
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Several small quirks have been fixed to make using Loopback with VoiceOver better than ever.
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A rare crash which could occur when metering audio while the system’s `coreaudiod` process was restarted has been fixed.
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An issue where focus rings could flash undesirably has been fixed.
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The celebratory sound effect heard when unlocking Loopback will now correctly play through the Mac’s configured “Sound Effects” device. After all, sound effects play through a separately configured output in MacOS.
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It’s now possible to control-click in the “Name” and “Code” fields of the “License” window, making it possible to copy and paste in data.
Loopback 2.3.0Initial Support for MacOS 14
Released on September 13, 2023
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Initial Support for MacOS 14 (Sonoma)
Loopback now has initial compatibility with the forthcoming MacOS 14 (Sonoma), with no known issues. -
Improvements in ACE 11.9.4
The Audio Capture Engine (ACE) has been updated to 11.9.4, with compatibility for MacOS 14 (Sonoma), correct capture of audio from Xcode Playgrounds, and many smaller improvements for even more reliable audio capture. -
Several small interface issues have been corrected.
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The “Quick Tour” has been updated to properly reflect the updated icon found in Audio Hijack 4.
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Loopback’s “About” box now shows the version of MacOS upon which it is currently running.
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MacOS 11 or higher is now required.
Loopback now requires MacOS 11 (Big Sur) or higher. If you're still on 10.15 (or lower), be sure to see our Legacy Software page.
Loopback 2.2.13
Released on April 14, 2023
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Improvements in ACE 11.9.3
The ACE audio capture engine has been updated with minor changes. -
Small improvements have been made to entering volume slider values from the keyboard.
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A rare crash which could occur when an audio device’s configuration changed has been fixed.
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Several improvements have been made to the naming of Loopback devices, to prevent issues such as devices having blank names.
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Changing the displays connected to the Mac no longer incorrectly triggers a spike in CPU usage.
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A drawing bug where wires might display incorrectly after toggling the visibility of Monitors has been corrected.
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Work has been done to avoid an issue where new ACE installations could incorrectly show an “Almost Ready” screen after restarting.
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A new “Uninstall ACE” option has been added to the “Debugging” window, accessible (by holding Option) before the app has fully launched.
Loopback 2.2.12
Released on December 19, 2022
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Full MacOS 13.1 Compatibility
Loopback now provides full audio capture on MacOS 13.1, with no known issues. -
Improvements in ACE 11.9.2
The ACE audio capture engine has been updated to provide full audio capture on MacOS 13.1. -
An issue which could cause Loopback to crash after its Uninstall process is run has been fixed.
Loopback 2.2.11Full Support for MacOS 13
Released on November 18, 2022
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Full MacOS 13 (Ventura) Compatibility
Loopback now has full compatibility with MacOS 13 (Ventura), with no known issues. -
New “Background Sound” Special Source
On MacOS 13 (Ventura), Loopback’s new “Background Sound” special source makes it possible to capture audio from this new feature, which can be found in Ventura’s “Accessibility” System Settings. -
Improvements in ACE 11.9.1
The ACE audio capture engine has been updated with several small bug fixes for improved performance.
Loopback 2.2.10Initial Support for MacOS 13
Released on October 20, 2022
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Initial MacOS 13 (Ventura) Compatibility
Loopback now has initial compatibility with MacOS 13 (Ventura), with no known issues. -
Improvements in ACE 11.9
The Audio Capture Engine (ACE) has been updated to 11.9, with compatibility for MacOS 13 (Ventura) and many improvements for even more reliable audio capture. -
Meters will no longer report invalid levels when their target device’s sample rate is changed.
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A rare channel mapping issue with certain devices which could result in instability for the `coreaudiod` process has been corrected.
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A logic issue has been fixed to prevent clock desynchronization when a device clock resets.
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Attempting to change volumes by selecting a volume knob then manually typing in a new value no longer causes an internal error. Further enhancements to all volume sliders in Loopback are planned for the future.
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Due to changes made by Apple, the “Text to Speech” special source is no longer available on MacOS 13 (Ventura). On Ventura, this audio can now be captured on a per-application basis by targeting the application where the text is being spoken.
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On MacOS 13 (Ventura) and up, Loopback’s “Preferences” window is now called “Settings”, to match the new MacOS convention.
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If the “Check for Test Releases” hidden preference is enabled, checks will now run regardless of the status of the “Software Update” preference/setting.
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Loopback now requires MacOS 10.15 (Catalina) or higher. If you're still on 10.14 (or lower), be sure to see our Legacy Software page.
Loopback 2.2.9
Released on June 29, 2022
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Improvements in ACE 11.8.2
The Audio Capture Engine (ACE) has been updated to 11.8.2, with many improvements for even more reliable audio capture. This includes a workaround for issues with FaceTime volume when using the built-in microphone, as well as an improvement in dealing with poorly implemented Audio Units. Tracking of audio device sample clocks also now works better when the device is providing erroneous information. CPU usage has been reduced in many common audio flows, clock synchronization across devices has been improved, and persistent device tracking has been improved. -
An issue where upsampling of certain low sample rates could sometimes produce audio artifacts has been resolved.
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When the full version of Loopback has been unlocked, the “License” window now subtly shows the application's version number.
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Fussy typography improvements have been made to the mailing list sign-up window shown at the fifth launch for new users, as well as the “Release Notes” window shown at the first launch of a new version, which you might be looking at right now!
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Software Update checks now occur only after the Welcome Window has been closed.
Loopback 2.2.8
Released on March 11, 2022
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Updates to ACE 11.7.8
The Audio Capture Engine (ACE) has been updated to 11.7.8, with several small improvements for even more reliable audio capture. -
Support for EVE Online
Loopback now properly recognizes audio from EVE Online. -
Assorted improvements have been made to better handle misbehaving Universal Audio devices.
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As a result of changes to MacOS, the Shortcuts app erroneously showed non-functional Shortcuts for Loopback. This has been corrected, and those invalid Shortcuts will no longer appear. We hope to add proper Shortcuts support to Loopback in the future.
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Monitors now correctly disable volume controls when a device doesn't support them.
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A new “Disable hardware volume control” Hidden Preference has been added, to manually disable non-functional volume sliders, for use with devices that inaccurately claim to allow volume adjustment.
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The “Quick Tour” window now offers Dark Mode support.
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Updates to the anonymous UserSurvey have been made, to better understand usage of Pass-Thru and Mute when Capturing.
Loopback 2.2.7Initial Support for MacOS 12
Released on December 8, 2021
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Full MacOS 12 (Monterey) Compatibility
Loopback now has full compatibility with MacOS 12 (Monterey), with no known issues. -
Updates to ACE 11.7.7
The Audio Capture Engine (ACE) has been updated to 11.7.7, with several small improvements for even more reliable audio capture.
Loopback 2.2.6
Released on October 16, 2021
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MacOS 12 (Monterey) Improvements
Several small improvements have been made for Loopback's support for MacOS 12 (Monterey). -
Updates to ACE 11.7.6
The Audio Capture Engine (ACE) has been updated to 11.7.6, with small improvements for MacOS 12 (Monterey), as well as a fix for capture issue with Catalyst-based (and AVFoundation-based) apps. -
The performance of devices with many channels has been improved.
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VoiceOver Improvement: The “Delete” and “Hide Monitors” have been re-grouped, for ease of use.
Loopback 2.2.5Initial Support for MacOS 12
Released on October 1, 2021
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Initial MacOS 12 (Monterey) Compatibility
Loopback now has initial compatibility with MacOS 12 (Monterey), with no known issues. -
New “AirPlay Receiver” Special Source
A new “AirPlay Receiver” special source has been added on Monterey, making it possible to capture audio sent to the Mac via AirPlay. -
Fixes and Improvements in ACE 11.7.4
The Audio Capture Engine (ACE) has been updated to 11.7.4, with fixes for several rare issues. -
The pressed state for the “New Virtual Device” and “Delete” buttons has been restored.
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VoiceOver Improvement: When navigating to sources and monitors, they now announce their status (“Enabled” or “Disabled”).
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Loopback now works better with applications like MuseDash which have non-traditional bundle structures.
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Loopback now requires MacOS 10.14 (Mojave) or higher. If you're still on 10.13 (or lower), be sure to see our Legacy Software page.
Loopback 2.2.4
Released on June 29, 2021
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Fixes and Improvements in ACE 11.7.1
The Audio Capture Engine (ACE) has been updated to 11.7.1, with fixes for several rare issues. -
New “Sound Effects” Special Source
A new “Sound Effects” special source has been added, making it possible to capture sound effects like alerts in the Messages app, or the Trash being emptied. -
Enhancements to Loopback's Built-In Updating
Loopback's updating code has been overhauled and improved. It is now based on Sparkle 1.26.0, with several customizations.• To avoid possible issues, Loopback will no longer offer to “Install on Quit”. Automatic background updating has been removed as well, placing the user in charge of all updates.
• The update interface has been improved, with several design and text enhancements.
• Finally, the new “Skip for Now” button allows you to delay updating if desired.
As always, we strongly recommend leaving the “Automatically check for updates” option enabled.
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Loopback's manual is now provided online, rather than being built in to the application. The application's “Help” menu has also been modified and streamlined, to get you assistance as quickly as possible.
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Volume sliders now reset to 100% when their readout is double-clicked.
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Many debugging improvements have been made:
• Available logs have been cleaned up.
• Active logs are now listed in the logging files.
• Machine details are no longer needlessly included in copied errors.
• Logs are now activated with simple checkboxes.
• When a log is activated, it will also collect recent crash logs, to better understand any issues.
• A “Quit and Relaunch for Debugging” option has been added, accessed by pressing option in the Help menu.
• Command-line debugging options have been added.
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Assorted drawing issues where items would fail to properly highlight on MacOS 11 (Big Sur) have been corrected.
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Loopback's windows will now interact with full screen mode on MacOS 11 (Big Sur) as expected. This also corrects a previous incompatibility with window managers such as Magnet.
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Loopback devices will now work correctly when used as the system's “Sound effects” device.
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USB device references for certain low-quality devices have been improved, to work better with some third party drivers.
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It's now possible to access several relevant menu items while the initial Quick Tour is open.
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The “Purchase” button in the License window now uses a better link to get to the Buy page.
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The Update window's width has been tweaked, to handle longer titles.
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Get Access to Test Builds
Loopback now features a new “Check for test releases” hidden preference. When active, you may receive notice of pre-release versions of the software, ahead of its wide release. If you're interested to test updates, you can turn this option on in the Debugging window (accessible by holding option while viewing the “Help” menu, then selecting “Quit and Relaunch for Debugging”).
Loopback 2.2.3
Released on March 5, 2021
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Major Updates in ACE 11.7
The Audio Capture Engine (ACE) has been updated to 11.7. Its sample rate converter has been upgraded, drift correction has been improved, and several rare issues have been resolved. -
Support for Xcode's Simulator
It's now possible to capture audio from Xcode's Simulator with Loopback. -
The Quick Tour now properly supports the new “Speak items under the pointer” setting in MacOS 11 (Big Sur).
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Improvements have been made for the Installer and Quick Tour, to present better on small resolutions, using scrollbars to make all content accessible.
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When Loopback is unlocked by entering a valid license key, in addition to displaying an animation, it will now play a brief celebratory sound for visually impaired users.
Loopback 2.2.2
Released on January 26, 2021
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ACE Updated to 11.6.3
The Audio Capture Engine (ACE) has been updated to 11.6.3. This update has several fixes, and provides further handling for future MacOS updates running on Apple Silicon. As before, M1 Mac users should update immediately. -
Loopback will no longer crash when an audio device reports an invalid volume.
Loopback 2.2.1
Released on January 11, 2021
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Fixes and Improvements in ACE 11.6.1
The Audio Capture Engine (ACE) has been updated to 11.6.1, with several fixes, as well as a workaround for an incompatibility with future MacOS updates running on Apple Silicon. M1 Mac users should update immediately. -
Full Compatibility with M Chip-Based Macs
Loopback now has full compatibility with new Macs powered by Apple Silicon. -
Loopback virtual devices will once again correctly update icons in Audio MIDI Setup, and other apps.
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Improvements have been made to level meters, so disconnected monitors no longer incorrectly show activity.
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On MacOS 11 (Big Sur), Loopback now allows machine sleep in cases where it is otherwise inactive.
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Loopback now works around issues with aggregate devices, by handling drift correction in more cases.
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Loopback’s notifications for missing devices now better handle devices which frequently disconnect.
Loopback 2.2.0Full Support for MacOS 11
Released on December 14, 2020
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Initial Support for M Chip-Based Macs
Loopback is now a Universal app, offering initial support for the new M1 chip-based Macs. Though there are no known issues, we do not yet recommend its use in critical productions. Further testing is ongoing, with more updates to follow. -
Full MacOS 11 (Big Sur) Compatibility
Loopback now has full compatibility with MacOS 11 (Big Sur), with no known issues. -
ACE 11.6 Brings Audio Capture to Apple Silicon Macs
The Audio Capture Engine (ACE) has been updated to 11.6, offering compatibility with Apple Silicon Macs. -
Loopback now respects the user-specified system-wide “Accent” color on MacOS 10.14 (Mojave) and up. It also supports Big Sur's new “Multicolor” option, with an appropriate, app-specific green.
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Further improved the tracking of hopeless USB devices that incorrectly lack the identifiers used for tracking.
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A sound quality issue that could manifest when Loopback devices were used with aggregate devices has been corrected.
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A race condition which could occur when audio playback or recording was stopped has been fixed. This avoids issues with future audio playback or recording failing, and fixes another Pro Tools incompatibility.
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Loopback will once again correctly use an OS notification to indicate when an in-use monitor device goes missing.
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Device icons now properly appear in the “Monitors” device selector on Big Sur.
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A rare exception which could occur when using “Full Keyboard Access” has been fixed.
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Loopback's app icon has been modified ever-so-slighty, to fit in with icon sizes on Big Sur.
Loopback 2.1.9
Released on November 12, 2020
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Backend updates have been made for better future compatibility with the new M1 chip-based Macs. Additional updates with support for these machines will be forthcoming.
Loopback 2.1.8Initial Support for MacOS 11
Released on November 9, 2020
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Initial MacOS 11 (Big Sur) Compatibility
Loopback now has initial compatibility with MacOS 11 (Big Sur). -
ACE 11.5 Brings Audio Capture to MacOS 11 (Big Sur)
The Audio Capture Engine (ACE) has been updated to 11.5, offering initial compatibility with MacOS 11 (Big Sur).
Loopback 2.1.7
Released on October 28, 2020
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Additional Audio Fixes in ACE 11.2.2
The Audio Capture Engine (ACE) has been updated to 11.2.2, fixing several issues. Playback to Bluetooth devices has been improved, non-standard audio formats will again play as expected, and several regressions have been fixed. -
The performance of pass-thru devices has been improved, with unnecessary drift correction now avoided whenever possible.
Loopback 2.1.6
Released on October 24, 2020
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Critical Fixes in ACE 11.2.1
The Audio Capture Engine (ACE) has been updated to 11.2.1, fixing a regression which would cause captured input audio to be improperly muted, as well as a crash which could occur with multi-output devices.
Loopback 2.1.5
Released on October 22, 2020
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Audio Capture Has Been Improved With ACE 11.2, Including Full Support for Catalyst Apps
The Audio Capture Engine (ACE) has been updated to 11.2, with many backend enhancements. Catalyst apps like “Voice Memos” are now fully supported, aggregate devices now work better, and many other small improvements have been made. -
Support for Chrome's “Progressive Web Apps”
Audio will now be captured from Chrome web apps, also known as progressive web apps. -
Full Support for Catalyst Apps
Loopback now works as expected with Catalyst apps such as Voice Memos, Podcasts, and more. -
Latency has been minimized when using a pass-thru virtual audio device.
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The device list meters are now more representative of audio passing through the device.
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Support for Cisco's various chat applications, like Webex Meetings, has been improved.
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Improvements have been made for dealing with audio from the Home app.
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Using a Loopback pass-thru device for system sound effects will now work as expected.
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Loopback no longer incorrectly disables devices when ACE is updated.
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A rare crash which could occur when using too many monitors for Loopback's main window to fit visually has been fixed.
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Loopback is not yet compatible with MacOS 11 (Big Sur), but we expect to have an additional release with support in the very near future. Stay tuned!
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Loopback now requires MacOS 10.13 (High Sierra) or higher. If you're still on 10.12 (or lower), be sure to see our Legacy Software page.
Loopback 2.1.4
Released on March 24, 2020
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ACE 11.1.4 brings several fixes
The Audio Capture Engine (ACE) backend has been updated to 11.1.4, which fixes several different issues. -
Multiple issues related to aggregate devices have been fixed, including corrections for missing audio and issues with sample rate mismatches. Issues with capture of FaceTime, Podcasts.app, and more, should now be resolved.
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A problem where short glitches could occur when starting to send audio to Bluetooth devices has been corrected.
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An extremely rare crash, which could be seen when devices have massive buffer sizes, has been fixed.
Loopback 2.1.3
Released on March 3, 2020
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Improvements and Fixes With ACE 11.1.3
The Audio Capture Engine (ACE) has been updated to 11.1.3, with many backend enhancements including additional fixes for device tracking, and work arounds for issues with Bluetooth. -
Applications which lack a bundle identifier (such as “DOSBox”) are now correctly handled by Loopback.
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Previously, audio devices which failed to properly report their “physical transport” setting might not be captured or heard. This issue has now been resolved.
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Improvements have been made to all level meters, to reduce the amount of CPU used and improve performance in multiple situations.
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The main Loopback window's visibility now toggles with the menu option in the Window menu.
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Updates have been made to the error alert shown when uninstallation is being blocked by another application.
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Loopback's debugging has been updated, to include more detailed configuration information.
Loopback 2.1.2
Released on December 12, 2019
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Full MacOS 10.15 (Catalina) Support
At this time, Loopback now has full compatibility with MacOS 10.15 (Catalina). -
Audio Capture From New Special Sources
Loopback can now easily capture audio from Siri and VoiceOver, simply by selecting them from the Special Sources area of Loopback's Source selector. -
Enhanced Audio Capture with ACE 11.1
The Audio Capture Engine (ACE) has been updated to 11.1, with many backend enhancements. -
Improvements to Bluetooth Device Reliability
Loopback now does additional work to avoid issues caused by Apple's Bluetooth device handling, so Bluetooth devices will work more reliably when included as part of a Loopback virtual audio device. -
Further improvements have been made to the tracking of USB audio devices.
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An issue where an incorrect sample rate assignment could prevent devices from being enabled has now been resolved.
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Several changes have been made to improve performance and robustness, and to better handle changes to configurations while running.
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An issue where Loopback devices could fail to be fully removed when the application is uninstalled has been corrected.
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A useful “Reinstall ACE” debugging option is now available by option-clicking the Loopback menu. This will uninstall and then immediately reinstall ACE.
Loopback 2.1.1
Released on September 25, 2019
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Important Crash Fix
A crash which could occur on launch has been fixed. This crash was rare, occurring only when an Application Source's icon could not be found, but it's now entirely corrected.
Loopback 2.1.0
Released on September 16, 2019
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Loopback now offers support for Dark Mode on MacOS 10.14 (Mojave) and up, with a new Dark theme. Loopback will automatically match the system appearance, but can also be set to either Light or Dark mode manually.
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Loopback's tracking of physical audio devices has been overhauled and dramatically improved. It will now better handle issues caused by many USB audio devices. Loopback will automatically track devices across restarts and between ports on your computer, so fewer adjustments are necessary.
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Loopback now has preliminary compatibility with MacOS 10.15 (Catalina).
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The backend Audio Capture Engine (ACE) has been updated to 11.0.0, with preliminary MacOS 10.15 (Catalina) compatibility as well as other fixes and improvements.
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Level meters have been optimized to use substantially less CPU. They've also been smartened up, to better reflect reality in certain tricky configurations.
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Loopback is now better at alerting you when physical audio devices have gone missing from your Mac.
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Several interface refinements have been made. It is now much clearer when a device and block is disabled, selected items have been given a better appearance, and new devices automatically allow you to edit their names.
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Loopback's wizard for installing, updating, and removing ACE (among other tasks) has been overhauled, with many small improvements and enhancements. Update notes are now presented on the first launch of a new version, and the wizard will now intelligently warn if uninstalling will impact other applications.
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Loopback now compensates for devices that are slow to start, so monitors don't miss audio at initial start-up.
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Loopback has been made much more resilient to breakage and corruption, often caused by cleaner utilities.
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Loopback now requires MacOS 10.12 (Sierra) or higher. If you're still on 10.11 (or lower), be sure to see our Legacy Software page.
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New Loopback devices now default to the same sample rate as the default system output, rather than always using 44.1 kHz.
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A new hidden preference, “ACE: Prioritize reliability over latency”, has been added. Though most users won't need this, the preference provides extra time for complex setups to process audio, at a cost of increased end-to-end latency.
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Loopback's Help menu now includes a useful new Release Notes window, so you can see changes across all versions from right inside the app.
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The look of messages displayed by Loopback has been modernized.
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Loopback's help manual has been improved and streamlined.
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The About box has been updated to provide additional version information in an easy-to-read fashion.
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Numerous other minor improvements and refinements have been made as well.
Loopback 2.0.1
Released on February 7, 2019
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Volume sliders all now feature a helpful percentage readout.
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Routing audio from Twitch desktop app is now fully supported by Loopback.
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Smarter output device names are now used in the Monitors section.
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The Device Editor area now includes a “Delete” button, which will remove any and all selected items.
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Improvements have been made for devices imported from Loopback 1, correcting a minor issue where muting modes would sometimes be set incorrectly.
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The launch behavior when another copy of Loopback is open has been improved.
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The volume indicator icons now use 1/3 of the slider for each wave.
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An issue where devices could potentially reappear after uninstalling Loopback has been fixed.
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Sources are no longer incorrectly added to a device if the user cancels the “Select Application…” dialog.
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The Pass-Thru source now includes some explanatory text, as well as a link to the manual.
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The support form in Loopback's Help menu has been updated.
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Loopback now includes a hidden “Reduce Animations” preference, as a CPU-saving measure. Meanwhile, a no-longer-relevant hidden preference dating back to Loopback 1 has been removed.
Loopback 2.0.0Paid Upgrade From Loopback 1
Released on November 30, 2018
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A Massive Interface Overhaul
The most noticeable change in Loopback 2 is its brand-new user interface. The first version of Loopback offered tremendous audio routing capability, but harnessing that power was not as simple as it could've been. For version 2, we worked hard on a redesigned interface that will be intuitive for everyone. Loopback now features a simple new wiring system that lets you easily visualize and adjust how your audio will flow. -
Volume Controls Galore
Users asked for it, and we provided it. Loopback 2 provides control over volume levels at every step of the way. The volume from individual sources can be tweaked relative to other sources, to get the perfect mix. Audio levels sent to monitoring devices can also be adjusted, as can the audio level from the virtual audio device itself. -
More Powerful Monitoring
Monitoring virtual audio devices is now simpler than ever. Just add a monitor at the end of the device, and wire it up to get the exact audio desired. Listen in to the entire device, or use the custom wiring to monitor just part of the audio. You can even have multiple Monitors per virtual audio device, so you can hear exactly what you need to. -
Capture Hidden Sources
Audio can now be captured from previously unavailable sources, like Siri, VoiceOver, and Text-to-Speech. Hold down the option key while clicking the Add Source button to reveal the “Running Processes” menu, then select the correct hidden source. -
Up to 64 Channels
Virtual audio devices can now provide up to 64 channels of input and output, for amazing power. -
Fully Configurable Channels
Just about any setup is now possible, with configurable routing of audio from all audio sources to output channels, as well as from output channels to the new, more powerful monitoring devices. -
An Explicit Pass-Thru
Source Pass-Thru functionality, previously an implicit part of Loopback, is now visible as an actual audio source. This allows for more power and control over the audio passing through your virtual audio devices. -
On/Off Toggles for Sources and Monitors
Loopback's virtual audio devices are more configurable than ever, with the ability to turn off individual sources and monitors within a device. Rather than deleting a source or monitor, and losing its settings, you can now temporarily toggle it off as you make adjustments to get exactly the audio you need. -
Much More to See
Loopback 1 users should be sure to visit our New in Loopback 2 page.
Loopback 1.2.1
Released on September 7, 2018
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Audio Capture Engine (ACE) has been updated to 9.1.0, with MacOS 10.14 (Mojave) compatibility.
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A rare bug where very complex virtual audio devices could cause the `coreaudiod` process to crash has been fixed.
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Loopback now has compatibility with MacOS 10.14 (Mojave).
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Loopback now requires MacOS 10.11 (El Capitan) or higher. If you're still on 10.10 (or lower), be sure to see our Legacy Software page.
Loopback 1.2.0
Released on May 4, 2018
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Loopback's virtual devices now have fully adjustable volume controls for both input and output. See this Knowledge Base article for more details.
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Audio Capture Engine (ACE) has been updated to 9.0.3, with fixes and improvements.
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Another update to License window has been made.
Loopback 1.1.8
Released on April 19, 2018
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Audio Capture Engine (ACE) has been updated to 9.0.2, to fix several small issues related to installation.
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Loopback now works around device visibility issues caused by incorrect behavior seen in apps such Boom.
Loopback 1.1.7
Released on March 27, 2018
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An issue where Loopback's virtual devices could be incorrectly deactivated upon updating has now been fixed. Please check that your desired devices are enabled in Loopback's device list.
Loopback 1.1.6
Released on March 26, 2018
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Audio Capture Engine (ACE) is the new name for Rogue Amoeba's audio capture backend (formerly called “Instant On”). ACE has been updated to version 9.0, with several small fixes and improvements.
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The License window has been updated and improved.
Loopback 1.1.5
Released on September 27, 2017
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Loopback now has full compatibility with MacOS 10.13 (High Sierra).
Loopback 1.1.4
Released on July 24, 2017
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Loopback's audio capture system, powered by Instant On, has been updated to fix a crash on MacOS 10.13, as well as adding improved logging.
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Loopback's preliminary compatibility with MacOS 10.13 (High Sierra) has been improved. We still strongly recommend users stick with a fully supported version of MacOS for now, but those who are testing High Sierra are able to test Loopback as well.
Loopback 1.1.3
Released on June 23, 2017
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Loopback's audio capture system, powered by Instant On, has been updated to improve audio capture from VMWare Fusion, FaceTime, and Flash running in Safari.
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The monitoring menu now correctly shows multiple audio devices with identical names.
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An incompatibility with TouchBar Macs, seen when VoiceOver was on, has been corrected. In addition, the “Add Source” popup menu now properly accepts VoiceOver presses.
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Loopback's Preferences window has been updated to correctly mention anonymous data collection, which assists in future development.
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Loopback now has (extremely) preliminary compatibility with MacOS 10.13 (High Sierra). While we strongly recommend users stick with a fully supported version of MacOS for now, those who are testing High Sierra will now be able to test Loopback as well.
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Many small improvements have been added to make reading the Help manual easier.
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Loopback now requires MacOS 10.10 (Yosemite) or higher. If you're still on 10.9, be sure to see our Legacy Software page.
Loopback 1.1.2
Released on March 29, 2017
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Loopback now correctly routes audio on all channels when using nested devices and manual channel mapping.
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An issue where rapid starting and stopping of a device could cause monitoring to fail has been fixed.
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A very rare issue where the installer could fail to update over very old versions has been corrected.
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Loopback now collects anonymized information about virtual audio devices, to assist in future development.
Loopback 1.1.1
Released on December 22, 2016
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Notifications that inform the user about mis-configurations and other issues have been fixed to appear correctly at all times.
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Device monitoring now works even with pass-thru devices, avoiding a rare configuration issue where audio could appear to be lost.
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An obscure issue where deleting an audio source could lead to a crash has been corrected.
Loopback 1.1.0
Released on December 7, 2016
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Loopback now supports nested devices, allowing one Loopback virtual audio device to be embedded inside another Loopback device. Now you can create even more powerful (and complex) setups.
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Loopback's audio capture system, powered by Instant On, has been updated with full support for MacOS 10.12 (Sierra).
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We've made a ton of small but useful interface improvements, including tooltips for overly long device summary information, visual warnings for missing devices, a Type column in the Audio Sources table, improved window resizing and full-screen support, a popover in the Home view, and changing the “Select Application…” modal dialog into a sheet.
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Loopback can once again capture audio from FaceTime.
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A rare issue where monitoring could fail to turn on, or fail to turn off, has been corrected.
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You can now duplicate a virtual device, via the Edit menu. Undo is also now supported for virtual device creation and deletion.
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Loopback devices will now show a custom icon, based on their settings, in other apps like Audio MIDI Setup.
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Applications can now be dragged directly to the Audio Sources table to add them to a virtual device.
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If a monitoring device is missing, Loopback will now warn you via Notification Center, as well as in the app's main interface.
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Loopback now also uses Notification Center to alert you to software updates when the main application isn't open.
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Virtual devices now support the 176.4 kHz sample rate.
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An issue on Mac OS X 10.10 and higher has been fixed, so that console warnings are no longer incorrectly logged when Loopback launches.
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If the Instant On backend is unsupported (as on a brand-new OS), Loopback will now automatically check for an update.
Loopback 1.0.3
Released on July 28, 2016
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Instant On has been updated to version 8.3, with preliminary support for MacOS 10.12 (Sierra).
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Monitoring now automatically restarts when an output device is removed and then returns.
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Loopback now uses https whenever relevant.
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The text shown during the installation, updating, and removal of Loopback has been refined.
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Improvements have been made for instances where Loopback is run on unsupported (future) operating systems.
Loopback 1.0.2
Released on April 12, 2016
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Instant On 8.2.4 includes several small improvements for better overall performance.
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This update further improves the way Loopback devices behave in trial mode. When the trial limitations are triggered, quitting the Loopback application will now disable any active devices. With this change, noise will no longer persist with no obvious way to stop it.
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Backend changes have been made to improve compatibility with applications that do not properly handle device name changes.
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A rare problem where input devices could incorrectly be captured multiple times has been fixed.
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Error reporting has been improved, providing better details if a device fails to be created properly.
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A loss of audio sync could occur when a device's sample rate clock jumped backwards. That clock should never jump backwards, but some devices do things they're not supposed to. Loopback now handles that without a problem.
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Loopback's sample rate reporting has been adjusted to improve compatibility with certain apps, including MAX, Roon, and Screenium.
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Missing audio devices in the monitoring setting are now marked more conspicuously.
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Several other small improvements have been made.
Loopback 1.0.1
Released on January 13, 2016
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Instant On 8.2.1 improves the handling of Loopback devices while Loopback is in trial mode. Specifically, if the Loopback app is deleted without doing a proper uninstall, Instant On will handle cleaning up any Loopback devices left behind by disabling them.
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The Loopback trial now allows 20 minutes of use before overlaying noise on a device.
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Some small UI tweaks have been made, including a fix for the vertical centering on the “New Virtual Device” button, as well as an issue with scrollbars appearing in the trial window.
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Several other small improvements have been made.
Loopback 1.0.0
Released on January 11, 2016
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Initial public release
