Capture System Audio with BlackHole

If you want to record or route your Mac's system audio — whether for screen recording, podcasting, or music production — BlackHole is one of the best free tools for the job. It's a virtual audio driver that lets you pass audio between applications with virtually zero additional latency.

To get started, you'll need to set up a Multi-Output Device in macOS's Audio MIDI Setup. This allows you to simultaneously send audio to both your speakers/headphones and BlackHole, so you can capture everything your Mac is playing without losing monitoring.

Follow the step-by-step guide below to get it configured:

https://github.com/ExistentialAudio/BlackHole/wiki/Getting-Started:-Creating-a-Multi-Output-Device