protonimo

It actually resumed working after one of the frequent OS updates during the beta, and continued to work until recently. The "release candidate" of Big Sur appears to cause problems...

Thank you for your quick reply! I must be missing something. I replaced the kext and exec with the ones you linked, fixed ownership, and rebooted as requested by system...

I'm on a Macbook, so no BIOS.

**2014 MacBook Pro with Haswell i5-4278U I assure you voltage offsets worked-- verified by VoltageShift itself, as well as power draw/temperature/boost clocks under load. Undervolting too far caused crashes.

Good point, that's very possible. I don't have the knowledge to work around this. So if anyone manages to get things working on a mac running Big Sur release candidate...