MACOS WoW FPS Drops When Moving Camera(Using mouse)

I use MBP 1 16’'. I have like 200-300 fps in WoW Classic. It worked fine. Sometimes when I go alt+tab or like a different app for a second this comes back. FPS drops to 40-60 from 200-300. It happens when I use the mouse. When I use the mouse to control camera FPS drops to 30-60. When I rotate with arrow keys no fps drops.

Anyone please help?

Trying to keep the post up. Need help.

Is there no-one ?

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