Record both system audio and external microphone audio in MacOS

Prerequisites

1. External microphone

2. Blackhole -
   BlackHole

   ExistentialAudio • Updated Jan 22, 2025

Install Blackhole

1. Run this command to install blackhole-64ch package from github.

brew install blackhole-64ch

Setup

1. MacOS Spotlight → Audio MIDI Setup

2. Create new Multi-Output device
1. Bottom left + icon → Create new Device
2. Select Blackhole64ch
3. Select your preferred mode of output → External headphone, earbuds, speaker or all (multi-output).

3. Create new Aggregate device
1. Bottom left + icon → Create new Device
2. Select Blackhole64ch
3. Select your preferred mode of input → External microphone, earbuds etc.

4. System Settings → Sounds → Output → Select your Aggregate Device (Multi-Output)

5. System Settings → Sounds → Input → Select your Aggregate Device (Aggregate)

Record

1. Cmd + Shift + 5

2. Select Options → Microphone → Aggregate Device

3. Click → Record

4. Stop. → Cmd + Ctrl + Esc

Outcome