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REcetnyl IMAC began running extremely slow, thought I needed to update to Catalina but haven't yet. Initial Etrecheck suggested failing hard drive, but with full disk enabled it appears not to be case. any help appreciated. fairly new iMac from 2 years ago.
Did you apply the 2020-005 SecUpd recently, that has messed with many Mac's speed, & the cure is to reinstall Mojave, hopefully in Safe Mode.
See if you have unknown Profiles.
To remove a configuration profile in macOS:
Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode?
Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.
Yes.
I have tried safe mode and same. I am unsure about the security update.... so looks like reinstall mojave
IMAC running super slow, ETRECHECK included
