I launched GP5 yesterday just to do a plugin rescan and I got a macOS system notification about Intel-based applications not being supported.
I’m 100% certain I have the Apple Silicon version of GP5 installed, and I even stripped the Intel binary using a command-line tool called App Thinner via Terminal.
Well, yes. A few weeks ago. But this is the first time I’ve seen this message and I’m using GP5 pretty much daily. I’m guessing it has something to do with a plug-in update as I did a pretty extensive purge and update of plug-ins last week.