Chosen Solution
A 19,1 iMac purchased from OWC won’t complete the upgrade to Monterey from Big Sur 11.6.4. Research indicates that an EFI update fails if a third-party internal drive/SSD is installed. Apple says the OEM drive isn’t user-replaceable, and it’s the third party’s fault. OWC says that it’s Apple’s fault, only offering to send a loaner to update the EFI. Has anybody had this problem? Was a solution found that didn’t involve taking apart the iMac and swapping drives?
Don’t you love it each is pointing to the other! The version of OWC Aura drive could be a factor if you don’t have the OWC Aura Pro X2 SSD. If OWC is offering a loaner I would take them up on the offer.
