Why not just use quicktime?

Edit: I think you might have skipped reading the post. It's about OBS on MacOS. Where quicktime exists. Your suggestion seems geared toward Linux.

QuickTime cannot record system audio output without shenanigans.

	▲	jasonlotito 5 days ago \| parent [-]
		Yep, if you want to do something more than screen recording, just screen recording won't work. Nor will the OP's comment.