Hi @noris, guys, I think I found kind of an implementation that will make this issue less painful at least for me and other users running the core in the high GPU usage affected Mac.
I backed up Roon DB > removed Roon completely > downloaded Roon Server for Mac, Bridge and Roon > Proceeded with the install:
1-Roon server.
2-Roon bridge.
3-Roon to have an interface.
This way when the high GPU usage occurs I do not have to recycle Roon completely, I will just do command Q to close the interface, but Roon Server and bridge will continue working in the background, meaning the music will continue playing:
Looks like this approach will help as well with the crazy CPU usage many users report, before this change my Roon was using 300% of CPU, now check this out 2%, 4%… and has been running since yesterday without having to reboot the Mac. This quarantine/lockdown is driving me crazy 
Definitively the GPU issue in the interface for these Macs still has to be fixed, it just happened.