Ben from support here, I wanted to check in on this thread to see if you were still having issues getting your remotes to recognize your core? If so, @Mike_O_Neill does bring up a good point in that including all your network information would be very helpful in this case.
Are you able to pull up Roon on your Mac core? What do you see when you to go Setttings>About?
PS - I saw from your profile that you’re from the Manchester, NH area. I’m originally from just over the hill in Vermont. Small world! Beautiful place over in the manchester area, too. Can’t beat early fall in the northeast!