Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Level 1

16 points

Cannot upgrade to Monterey with non-apple SSD.

I cannot upgrade from Big Sur (11.6.1) to Monterey. I was unable to do so with the beta and now that the production release is available I'm still having the same issue. When attempting to run the installer from the applications folder, it fails to restart and prompts me to launch the application again. So I created a bootable USB using createinstallmedia and that progresses further, but during the restart process, it eventually fails with a "firmware upgrade could not be installed. Compatible internal media ..." error message. It then launches the startup disk dialog and I reboot back into Big Sur.

Mac Pro, macOS 11.6

Posted on Oct 26, 2021 8:20 AM

Best reply

zippy-zinger

Level 1

23 points

Posted on Oct 26, 2021 11:15 AM

I ran into the same issue and contacted OWC to see if they had a firmware update available for my SSD. Talking to support, they said that it isn't the SSD that requires the firmware update, but the MacBook Pro itself, which requires an EFI update that won't be installed unless there's an Apple SSD installed. They recommended that I reinstall the original Apple SSD, then install Monterey to get the EFI update, then replace the Apple SSD with the OWC SSD, and upgrade from Big Sur 11.6.1 to Monterey. According to OWC, they've tested this fix in their lab and it works. (We'll see.)

View in context

Cannot upgrade to Monterey with non-apple SSD.

Similar questions