error code 69716 for macOS 10.15.7
"Storage system verify or repair failed.
How do I fix it?
iMac 21.5″, macOS 10.15
Question marked as
From my notes..
-69716 System verify Storage Repair failed…
on an iMac (late 2012) with a 1TB Fusion Drive.
anyway, long story short... needed to recreate the fusion drive from the recovery terminal (after Backup, of course). After recreation, installation worked fine.
This is definitely a Fusion hardware issue. I think that the drive is bad and needs to be replaced.
MacOS Update Hangs with "Storage system verify or repair failed (-69716)"
How to fix a split Fusion Drive
If your Fusion Drive appears as two drives instead of one in the Finder, it's no longer working as a Fusion Drive. Here's how to fix it.
How to fix a split Fusion Drive - Apple Support
diskutil resetapple fusion join