cannot install macOS 10.13/later because of missing firmware partition
Hi guys,
I recently purchased a Mid 2012 13” as a computer in my other office. It came with a formatted hard drive, so I created a bootable installer of 10.12 Sierra. It completed successfully, but most of my apps didn’t work because of the obsolescence of 10.12. I know this computer can run 10.14/10.15 so I tried to install 10.14 (Mojave) but i got a message saying “you may not install to this volume because your computer is missing a firmware partition.” I tried to convert the drive to APFS because that fixed the issue in my 2015 pro. But then I got different message
(screenshot from 2009 MBP on 10.14 but exact same message on the 2012) So I restarted, reset the PRAM and tried a different disk but no luck. I found the newest EFI update (2.9) and tried to install the PKG and it gave me an alert that it cannot be installed on my computer. Any answers?
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