Moderators, not sure if this is the correct place for this; feel free to move if needed. I recently noticed several files / apps had disappeared from my iMac's boot drive. At the same time, my Backblaze cloud backup locked because it detected too many file changes. I ran Disk Utility and found the drive's Object Map is invalid (the drive had been converted to APFS when the machine was updated to Mojave). Of course Disk Utility can't repair the Object Map (why can't Apple's tools recover a file system when they aren't sharing details of it with 3rd parties!). And from looking online, without 3rd party software being available it seems my only real option is to wipe the drive, do a clean system install, and restore from a backup. Restoring from Time Machine takes forever so I want to make sure I am being smart about this. Are there any other options forward other than wiping the drive? Is there software I am not aware of that can repair this? Also is the Object Map randomly corrupting simply bad luck or a sign that my internal drive is dying? I was planning on a new computer purchase within the next year and I am reluctantly happy to speed up my timeline if it prevents this (or something worse) from occurring again in a few weeks.