Hello Mark, before posting i googled and found that you suggested me.
I understood that is a graphic related issue.
I found an application just updated that maybe give that issue.
If that app is open… launching RW8 i have the heating problem.
If that app is closed, I can use RW8 w/o problems.
The app itself don’t cause the problem until i launch RW8.
Now seems to be gone keeping that app closed, until the next update.
The App is Active Dock but i’m not sure if is this app the problem.
Now the app is open and opening RW8 nothing strange happen.
Very strange behavior.
Maybe, after the i opened RW7, Photo (apple app), something is changed in the system.
Anyway I’ll keep you informed if this will happen again
Although I can’t speak from experience of this particular software - so wouldn’t want to offend its vendors, as a Mac user since the early 1990s, I’ve rarely found a single application that changes the basic operation of the Finder or OS itself which doesn’t sooner or later cause trouble.