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BlackHole

github.com/ExistentialAudio/BlackHole Mac Apps Open-source project

BlackHole routes audio between Mac applications through a loopback driver for macOS.

Visit BlackHole
github.com/ExistentialAudio/BlackHole
BlackHole homepage screenshot

About BlackHole

BlackHole is a virtual audio loopback driver for macOS that lets applications pass audio to other applications, described by its developers as adding zero additional driver latency. It is distributed as builds with 2, 16, 64, 128, and 256 audio channels, supports sample rates from 8 kHz up to 768 kHz, and runs on macOS 10.10 Yosemite and newer with builds for Intel and Apple Silicon. The source states no kernel extensions or modifications to system security are necessary.

Documented uses include routing output from digital audio workstations such as Logic Pro X and GarageBand into FaceTime, Google Meet, Skype, or Zoom, recording system audio through a Multi-Output Device, and sending audio between applications by setting BlackHole as the output of the sending app and the input of the receiving app. Customization is done at build time through pre-compiler constants that control device names, channel count, latency frame size, sample rates, hidden devices, and a mirror device. A license from Existential Audio is required for all non-GPLv3 projects; pricing is not stated in the source.

Key features

  • Virtual loopback driver passes audio between macOS applications
  • Prebuilt 2, 16, 64, 128, and 256 channel versions
  • Sample rates from 8 kHz to 768 kHz
  • Stated zero additional driver latency
  • No kernel extensions or system security modifications required
  • Build-time constants customize channel count, latency, hidden and mirror devices
Best for: Mac users who need to route audio between applications, such as sending DAW output into a video-call app or recording system audio.
Good for
  • Runs on macOS 10.10 Yosemite and newer with both Intel and Apple Silicon builds
  • Widely configurable channel counts and sample rates, including build-time customization
  • Installable through a package installer or Homebrew
  • User guides cover Logic Pro X, GarageBand, Audacity, and Reaper routing setups
Watch out for
  • macOS only; no Windows or Linux version is described
  • A license must be requested from Existential Audio for non-GPLv3 projects
  • Homebrew install and uninstaller downloads listed cover only the 2, 16, and 64 channel builds

BlackHole at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Platforms
macOS
Open source
Not stated
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026
macos

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BlackHole FAQ

How do I install BlackHole?
Download the latest installer package, close running audio applications, install, and restart when prompted. Alternatively, Homebrew commands are listed for the 2, 16, and 64 channel builds, such as brew install blackhole-2ch.
How do I uninstall BlackHole?
Use the uninstaller for the 2, 16, or 64 channel build, or manually delete the driver at /Library/Audio/Plug-Ins/HAL/BlackHoleXch.driver and restart CoreAudio with the command sudo killall -9 coreaudiod.
Does BlackHole require kernel extensions?
No. The source states that no kernel extensions or modifications to system security are necessary.
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Listing maintained by Chris McClure and the WebIndexly editors · Updated Oct 11, 2026 · How we rank