All audio outputs gone from Mac Mini - [Resolved]

Not certain we’re dealing with the same issue, but the fix for me has been to restart the machine running the core. Simply re-starting the Roon application leaves me without any accessible local zones. This problem has been very sporadic for me, and right now I can’t recall the last time it has happened.

Good luck, let us know if a re-boot fixes the issue. Cheers!