Details are as follows. I am using my iMac as the core and a PS audio direct dream dac and a sonic orbiter as end points. All worked fine until recently.
Now when I open up Roon on the iMac I get a message “select an audio zone” but the only outputs listed are the “system” output and the “built in” output - no PS audio or sonic orbiter. Also the roon app won’t open up on my iPhone