After updating my iMac and iPad to 943, Roon stopped working when the iMac goes to sleep. It shows “no audio devices found” and then loses connection altogether. As soon as you manually wake up the iMac, Roon works again. This is very frustrating, using Roon remote always woke up the iMac and it worked flawlessly until this update.
I fully understand the concept of Core availability, however, before the last update, opening the app in the iPad or iPhone woke the iMac. It has been liked that since the day I subscribed to Roon until yesterday. In the iMac Energy settings I had selected wake for network access and I thought this was why it worked as it did.