According to the Apple rules, Mac App Store apps can’t record system sound. However, Monosnap can use any audio input for recording audio. This means that the system sound can be recorded through the special emulator – fake audio device.

Setup the audio device

  • To create an audio device with a system sound, you need to download the application called SoundFlower. You can download it from GitHub.
  • Download and install file Soundflower-2.0b2.dmg

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Note: You can’t change volume on your mac as long as SoundFlower is turned on. That is why check twice the output level of sound on your mac and set it up to acceptable level beforehand.

  • After that you need to open Audio MIDI Setup. To find easily this application on your Mac, you can use Spotlight.

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  • Open Audio MIDI Setup on your mac.
  • Hit the ‘+’ button in the bottom left corner and select “Create Multi Output Device”.

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  • In the the panel that appears on the right, select “Built-in Output” and “Soundflower (2ch)”.

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  • Hit the button with the gear icon bottom left and select “Use this device for sound output”. Close Audio MIDI Set

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  • Note for OSX Sierra users. After this setup you can switch between Multi-Output Device and Internal speakers using Sound Preferences sound preferences in the menu bar. If you haven’t this icon in the menu bar, go to System Preferences > Sound and turn on option Show volume in menu bar.
    Sound 2016-09-23 22-31-51
    Monosnap_2016-09-23_21-21-58
  • Look in picture below and set up same preferences in Monosnap.

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  • After that Monosnap will be able to record system sound. If you want to record system audio and audio from mic simultaneously, set up same preferences as in the picture below.
    OSX | Monosnap | Record video > Settings > Audio input (SoundFlower+Buil-in Micro)

    Note:

    • Always after working with Monosnap video recorder don’t forget to roll back some preferences in Audio MIDI Setup. Don’t forget to right click on Built-in Output and select then “Use this device for sound output”. If you ignore this step you’ll not be able to change system volume.

    • Check twice the output level of sound on your mac and set it up to acceptable level beforehand and only after that – switch device for SoundFlower.

[spoiler intro=”INFO for OSX 10.11 and lower”]

Unfortunately, you can switch between Multi-Output Device and Internal speakers using AUDIO MIDI Setup only as it shown in the pictures below. 

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[/spoiler]