i have completely lost my audio zones. Connection has been a bit hit and miss for some months but it has now gone completely. all other aspects of Roon work ok (i can see my music library etc) but no sound! i have a blue sound vault 2 which connects to my main stereo speakers and blue sound pulse flex speaker. the blue sound os works fine and recognises all speakers. my core is a mac (2016) running high sierra os. please help.
Hi @rory_hussey ---- I saw your PM to me first before seeing your post “here”, so I am going to copy over the information from my PM response to you in this thread 
Moving froward would you kindly please expand on the description of your current setup using this link as a guide and please verify for me if you have any active firewalls or antivirus applications running anywhere in your setup. If you do indeed have active firewalls and/or antivirus applications running, would you kindly disable these functions (temporarily) and confirm if this action triggers a change in behavior.
-Eric