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Hi. I updated from Catalina to Big Sur and my Mac became ridiculously slow. Reseting SMC/NVRAM/PRAM didn't help. I wiped it out and installed Catalina again. A couple of days later OS started to get slow again. Sudden and quite long spikes in CPU usage up to 90% make it impossible to work. Any help?
Here's current EtreCheckPro report:
MacBook Pro 15″, macOS 10.15
https://support.apple.com/guide/mac-help/if-your-mac-runs-slowly-mchlp1731/mac
Repair a storage device in Disk Utility on Mac
https://support.apple.com/guide/disk-utility/repair-a-storage-device-dskutl1040/mac
Reset SMC: https://support.apple.com/en-us/HT201295 Choose the appropriate method.
https://support.apple.com/guide/mac-help/if-your-mac-runs-slowly-mchlp1731/mac
Repair a storage device in Disk Utility on Mac
https://support.apple.com/guide/disk-utility/repair-a-storage-device-dskutl1040/mac
Reset SMC: https://support.apple.com/en-us/HT201295 Choose the appropriate method.
As a test remove CleanMYMac app according to developer's instructions temporarily and test.
Thanks for the advice but I installed it after it got slow, not before. I'm pretty sure it's not a problem here.
Catalina/Big Sur is too slow.
