A. Just ethernet
B. Yes. Both have Roon allowed
C. Disconnecting the DAC immediately makes the endpoint unavailable on the iMac even before sleep is initiated.
I do not need to respond to D. because I have found out what the issue is.
When I first started using the iMac as an endpoint with Bridge installed I found that if it was on then regardless of which audio output was selected on the iMac it would show as available in Roon and worded fine…until it went to sleep. The good news was that I could leave it set to one of the other outputs, which was easier for my wife, and then I did not need to change anything if I wanted to stream to it. What I found out during testing today is that if I choose the external DAC which powers my speakers then it will come back as available from sleep.
If I leave it set to “Internal Speakers” or the headphone output of her Elgato external firewire device then if the iMac goes to sleep then Roon Bridge needs to be restarted in order to become available. Once that is done then she can choose the other outputs and I can stream at will …until the until goes to sleep again.
I am not sure if this is a MacOS issue or a Roon issue but this is what I discovered.
Thanks for your interest in my issue!