I have updated to the release of MacOS 11.0.1/Big Slur and now my MacBook Pro 12 (2016) is getting hotter than heck and sounds like a jet engine. The cause seems to be System Interrupts taking a lot of Win10 CPU cycles. I am on Parallels 16, no updates are offered. I have uninstalled Parallels Tools and reinstalled them, no help. I can reboot Win10 and sometimes it settles down but after a bit of them I go into a overheating again. Two things show High CPU in Activity Monitor, my Win10 VM and then "ncPrwsmac". When I shut down my Win10 VM, ncPrwsmac drops away along with the WinVM. Then my laptop stops feeling like it is on fire and the fans spin down. I have a i9 8 Core CPU with 32GB of memory. I also have the mid level ATI card.