1. Install SoundFlowerbed from https://github.com/crmne/Soundflower/releases
2. Run SoundFlowerbed from applications
3. Locate the Flower in the menu bar and change the setting for input for 2 channel. (See Image Sound Flower Bed Menu Settings)
4. Open System Preferences and go to Sound, click on the Input Tab and select Sound Flower 2 Channel. (See Image System Preferences Sound Input)
5. Click on the Output Tab and select Sound Flower 2 Channel. (See Image System Preferences Sound Output)
6. Run Screencast-o-matic, and select the microphone to be Sound Flower 2 Channel. (See Image Screencast Mic Selection)
After this is set up you should be able to record the Screen and the Audio.
Record Sound from screencast-o-matic on Mac using Soundflowe
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