Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

lonejerk

macrumors newbie
Original poster
Jan 29, 2006
2
0
cMP 5,1 with unflashed GPU

I used a native Mojave OS volume which booted on the cMP 5,1 to build and install OCLP 2.2.0 to prepare a new separate volume installing Sonoma OS. The native Mojave OS volume booted normally without the OCLP boot picker (OpenCore Picker) and I was able to use the native Mojave OS to create and build a OCLP macOS installer for the new separate volume and that worked for that new separate Sonoma OS volume. My issue is that I decided to enable (bless) the OpenCore EFI on the native Mojave OS volume on the cMP 5,1 with unflashed GPU following the instructions on the Dortania Booting OpenCore and MacOS unflashed GPUs section of the guide. And that work to show the OpenCore Picker as promised by the instructions. However I am unable to boot into the native Mojave OS or the Recovery feature of that Mojave OS and would like know how to undo “unbless” reverse this mistake. If I select the recovery option of the Sonoma OS volume I am able to access that terminal and can see the volumes as I had originally done using diskutil list command. Google AI suggest using diskutil unmountDisk /dev/diskXs1 (Replace X with the drive number) command will unmount the EFI partition and effectively “unbless” said EFI.

Update: I need help with the 864 Core Sevices/boot.efi in the last photo. If I rebuild OCLP on that volume will it remove the "blessed" bot.efi?

Please advise.
 

Attachments

  • IMG_9528.jpg
    IMG_9528.jpg
    376.7 KB · Views: 32
  • IMG_9529.jpg
    IMG_9529.jpg
    756.9 KB · Views: 17
  • IMG_9531.jpg
    IMG_9531.jpg
    427 KB · Views: 19
  • IMG_9530.jpg
    IMG_9530.jpg
    733.3 KB · Views: 21
  • IMG_9532.jpg
    IMG_9532.jpg
    711.4 KB · Views: 20
Last edited:
You can boot into Mojave with the native boot picker by starting with Option pressed.
To restore normal boot behavior, do an NVRAM reset - **** down, start, and press CMD-Opt-P-R.
 
  • Like
Reactions: lonejerk
... or simply hold the ctrl-key in the apple native boot picker, while selecting Mojave. This gives an arrow icon and it blesses the selected OS.
 
  • Like
Reactions: lonejerk
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.