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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%..
Do you have Sophos Home installed? If you do, try uninstalling it. Several people have reported slowing down related to it.
For what I've seen, if your situation is like mine, it can be caused by a third part app such as an antivirus or something similar
YES ! I had same problem. Uninstalling Malwerbytes solves this .
For me, it was "DeepInstinct" app. Removing it stopped "kernelmanagerd" CPU consumption immediately.
Hd the same issue with fan high drain. Updated malwarebytes for big sur and cured
I uninstalled Malwarebites & it resolved the problem
I have same problem. I uninstalled malwarebytes but nothing changed.
what do you mean for uninstalling malwarebytes? how do you do it? malware is like virus right? can I ask how you do it ?
omg I have deleted the app and it. orks!!!! works why is. y key board is. ike this? do you. now any problem with this one? hhahaha
I have this as well - no antivirus or any of the software previously mentioned. If I force quit 'everything' the issue remains.
Updating my keyboard customizer Karabiner Elements to 13.1.0 fixed this issue for me - thanks!!!
Same here! It was Karabiner Elements - I had forgotten about this app, I never really used it.
Removed it, rebuilt the kext cache, rebooted, and problem solved.
I uninstalled too Malwarebytes and nothind changed. Do you have any process ?
I uninstalled it properly through the app instead of just moving it to the trash and it worked.
kernelmanagerd process causing high cpu usage & battery drain
