Sorry, I was not clear. It’s a two-steps problem.
While working in Dorico, the Mac becomes unresponsive. The spinning wheel appears, sometimes alternating with the hand pointer. The mouse pointer continues to move, songs continue to play, but you can’t access any of the windows. I’ve not found a specific operation when it happens; last time I was entering gradual dynamics. Can’t remember if it always happens when also using Vienna Ensemble Pro or not.
I turn the display off and then on, and this causes the Mac to have a kernel panic and restart. Or I have to force-power off the Mac while it is unresponsive. Either of them.
The Radeons in the Mac Pro 2013 have (had?) an issue with this type of freeze. The only times I’ve experienced it is while using Dorico. Not with software, even obsolete (like Adobe CS6), that I use for longer. And it is a recurring issue.
I would like to locate what is happening when it happens, but so far I’ve not been able to find anything I can understand in the various logs around that time. Being able to find for something in particular would maybe help finding the culprit.