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I've just updated to macOS Big Sur 11.0. and I'm facing a huge battery drain and cpu usage probably caused by this "kernelmanagerd" process. Is there something I can do to stop it?
MacBook Pro 13″, macOS 11.0
I was facing the same issue after updating to macOS Big Sur. Even removing Malwarebytes and few more third party app from the applications folder + thrash was of no help. Found and article which mentioned that this KernelManagerd problem is caused by a third-party kernel extension and you may need to look further to find the incompatible software.
You can find it in: Finder > Go > Go to Folder > and type /Library/Extensions into the text field. You will see a list of files with the .kext file extension. You may ignore the following files, if you see them:
AppleMobileDevice.kext
HighPointIOP.kext
HighPointRR.kext
SoftRAID.kext
You can find information on your other .kext files with a google search. I deleted MB_MBAM_Protection.kext, (Leftover Malwarebytes file) the moment i did my %CPU for KernelManagerd went from 70%+ to 0%..
Finally I did clean install. and my Mac is now good. there is no problem. that's it.
Try to clean install. that might be helpful for your Mac.
I hope your Mac will be better.
Thank you, thank you, thank you!! MB_MBAM_Protection.kext was my culprit.
Running on Big Sur version 11.2.1 (20D74) and had my CPU running at over 900%. After this screenshot was taken it jumped to over 1000%
kernelmanagerd process causing high cpu usage & battery drain
