Few ppl here already reported this few releases ago and the bug lives on..
Very simple, on the macbook settings has an option to save battery called "Low power mode"
If you're not on low power mode the render speed drops to 600-750% (processors power), when you switch it on to Low power mode the processor's cores go full blast up to 900% ish speed.
It wouldn't be a big deal if I didn't have to use other apps that are very affected by the low power mode turned on
tested on lots of differente scenes,
it's not a Heat problem
I'm on Macbook pro 16 m1
tried on Cinema 4d r25,26 and 2023 latest version
Corona 9 final release