Does this work for screen recording?

[CyberMew]

I want to record screen on macOS + the audio coming out from the speakers. An option to also capture mic (OR to not capture mic) would be great. I don't see any instructions for this kind of scenario in the wiki, is this the right app for this purpose?

[CyberMew]

I manage to get it to work but the quality recorded for my mic is different via BlackHole versus direct

I tested it via QuickTime Player New Audio Recording, and selecting the macbook mic or the aggregated mic above.

[CyberMew]

How I got this to work is to create a Multi-Output Device in Audio Midi Setup, selected the macbook speakers and BlackHole 2ch:

Before each screen recording, ensure current output is the Multi-Output device instead of the macbook speakers.
In the screen recording option, select BlackHole 2ch as microphone device.

Not sure if this is the correct way but it worked for me. I think what is happening is that by selecting Multi-Output Device as the sound output, the OS outputs to both macbook speaker and to BlackHole. Now that BlackHole has the sound, we select BlackHole as the microphone, so that the screen recording will now record the sound from BlackHole (i.e. the audio from the OS).

If I want to screen record with system sound (e.g. YouTube) AND actual mic (voice over, lecture style, etc), then what I did was also to create the Aggregate Device this time on top of the above steps, 'use' the speakers, BlackHole 2ch, and the microphone (can be macbook mic or external usb mic). This is my setting:

The order in which you click Use will determine the arrangement order. I reduced the sample rate from 48 to 44.1 because it sounded better to me for some reason. So to get it (mic + system audio) working, for screen recording settings, instead of selecting BlackHole 2ch as microphone, we now select this Aggregate Device we created.

Just remember to set your output device to the Multi-Output Device before each recording and select either Blackhole 2ch (for system audio only) or Aggregate Device (for system audio and actual microphone) or actual microphone (without system audio).

Again not sure if this is the correct way or the most efficient but it is working for me..hope this helps someone