Wes,
I found them under Security & Privacy, Firewall. I have the firewall turned on and checked the apps that were allowed to accept connections. Roon was there, but not Roon Server, so I added that:
I did a quick test with my iPhone and iFi Zen stream after adding Roon Server, it played for a few minutes, then the iPhone lost the connection to my core, and the core was showing the ‘error’ and ‘not available’ messages for a bit.
Here’s what I’m showing for the selected Roon core:
One thing I’m seeing, using the Roon app directly on my mac mini seems to be generally stable, but using anything remoter (iPhone or iPad to control, iFi Zen Stream, Pi running RoPieee, etc) has the core crash frequently.
Chris