I can confirm that it is still some issue with Babyface Pro and OBS on MacOS.
Works fine on Windows 10, but I just got a new Macbook Pro with the newest mac os installed and updates installed.
I also tried diferent ways to route and lookback sound to see if it would work. Audio MIDI Setup, and installed Soundsource, Soundflower, JackPilot.. I think I went through all settings that would make sense. My Babyface driver shows up as an device in OBS, and I can comtrol it with TotalMix FX, and all other apps I tried to record with works too. Only OBS does not work.
Quite annoying.. I will see if any of ther older versions of OBS should work but I doubt it.
Cheers,
Frank