OBS with desktop audio in MacOS

By default, MacOS doesn’t support audio output. In OBS, the Desktop Audio is Disabled.

You need to install blackhole which is a virtual audio driver.

it can be downloaded here https://existential.audio/blackhole/ or https://github.com/ExistentialAudio/BlackHole

or install by brew in Terminal

brew install blackhole-2ch
brew install blackhole-32ch
brew install blackhole-64ch

Once it’s done, go to System Preferences -> Sound -> Output , you can see BackHold there. For OBS recording, you need to choose Multi-Output Device.

In OBS, the BlackHole will show up in Desktop Audio.

The Audio Mixer -> Desktop Audio should move while playing. Sometimes it becomes unavailable, you can just go to System Preferences -> Sound -> Output to switch between Multi-Output and other options, then it should be back to normal.

It should be working now!