hey everyone there is a solution.
keep Chess opening and launch BG3 with full screen.
thanks for steam player biggsy29, this is his post on 14/03 10:01 PM
--------------------
As seen in other threads concerning this issue, people mentioned that they forced the Game Mode on by opening Chess and going to full screen.
I tried this and an information box came up to say Game Mode was on, I left chess running opened BG3 in another window and yes it worked and the game ran fine.
So it’s obvious that for some reason the last patch is somehow not forcing the Mac into Game Mode , I sent a message to Larian giving them the info but just got the standard computerised reply suggesting remedies that have been tried over and over.
--------------------
i've tried this solution, it works better, but still not smooth as before.
What chess is he talking about? The built in MacOS one? I tried this and there is no information box that comes up. Nor is there a way I can see to launch said box. Re-downloading BG3 now to see if it has any effect, will post FPS. EDIT: I see, this requires Mac OS Sonoma. Will give it a try.
https://support.apple.com/en-us/105118But it looks like what's happening here is that the new Game Mode feature is covering up for the actual bug. So when Larian does finally fix this, switching to game mode will give us all even better performance than before, assuming one wasn't already using it. It's not that BG3 isn't activating it, it has only existed in Mac OS Sonoma and beyond. What it does is change scheduling priority (and other things) to speed up an app for gaming.
