How to record or stream MacOS audio output with live feedback using iShowU Audio Capture
There is no native way of recording a Mac’s output, so we are going to set up and install iShowU Audio Capture.
The result is going to be a virtual device, like a microphone, that “outputs your output”.
Note: if you don’t need to hear what you’re recording I recommend SoundFlower for its ease of use.
Installation and setup
- Install iShowU Audio Capture
- If you’re on Catalina or later, you’ll need to accept the System Software from Shiny White Box Limited. It will be under Security and Privacy in your System Settings.
2. Once the installation finishes, you’ll have to restart your Mac. This allows the system to load the new kernel extension.
- If it worked, you should now have iShowU AudioCapture under the Sound-Output panel.
3. Go to Audio MIDI Setup
- Add a new Multi-Output Device.
- Tick iShowU Audio Capture and your audio output. In my case, it’s my headphones.
- Set the master device as your output device.
4. Under Sound select the Multi-Output Device you created as your Output device. You will no longer be able to set the volume for this device, unfortunately.
5. Use iShowU Audio Capture as you would a microphone in any recording program on your Mac.
6. Have fun & profit!
My original source is this OBS forum post. If you prefer a video to follow along to, I highly recommend it.
