Unable to update macOS
iMac came preloaded with Big Sur & updated to Monterey last fall. Started noticing Hash Mismatch errors a little bit after this. First Aid saw error & could not fix. Did a backup, erased & tried reinstalling Monterey "error occurred" every time. Did a Time Machine recovery to around time when Montery was installed , & this seemed to work to at least get me going. Tried to update to 12.3.1 now this failed to update. Did clean install of Monterey " Error Occurred" every time even Safe Mode, resetting Ram . Same senario with a Big Sur installer. Only way I can get a OS on the Mac is with Internet Recovery and having Catalina OS. Tried update for Monterey and no go. This is a 250GB SSD HD
[Re-Titled by Moderator]
iMac 21.5″, macOS 10.15