I am currently setting up my a new M1 Mac for streaming using OBS Studio and was surprised that capturing audio from multiple sources other than the mic required this.
It is one of the few things I have found that “just works” on a PC compared to a Mac.
did you try setting up an aggregate device in Audio MIDI Setup?
I do a lot of audio work with Macs, and even use blackhole on occasion, but typically something as simple as capturing audio from multiple sources can be done natively with a simple aggregate device.
I would be very interested in knowing how to set it up natively as the OBS Studio [instructions][1] that I found recommended using BlackHole along with setting up the aggregate device in Audio MIDI Setup.
It is one of the few things I have found that “just works” on a PC compared to a Mac.
I am glad this exists, thank you!