I’ve spent the past month backing up my kids photos from my iMac to an external hard drive. My imac is dying a slow death so I wanted to get it all backed up. About 80% finished, it is taking a full day to copy one event through iphoto library manager, as an example.
I opened disk utility, verify disk. the first error was
The partition map needs to be repaired because there’s a problem with the EFI system partition’s file system.
Tried to repair and it said 'Error: Partition map check failed because no slices were found."
I’m at a loss here. Literally my only copy of every photo from the past 12 years (about 90,000 photos) are on this hard drive that is now dying on me. Any ideas?
2010 imac, 2.8ghz, 12gb memory.
Running OS X 19.9.5 (13F54)
WD 3TB external hard drive, 2 years old tops