Hi Everyone,
so I'm experience what seems like a windows/opencore related bootROM catastrophe on my Mac Pro 5,1. I can get into the details of how the situation happened if thats helpful, but for now I'll try to keep things brief and just describe the symptoms condition.
– My main Monterey boot drive (NVME) stopped appearing on the OC bootpicker. My old Catalina drive was still bootable, so I booted that to troubleshoot.
– After a few unsuccessful attempts to get the Monterey drive to boot, now I can no longer get to the OC bootpicker, my computer boots straight into windows (very bad for the bootrom I know.)
– If I remove the Windows drive, the computer will not boot ANY other mac OS, nor can I get recovery mode to start. The computer just powers on for a moment, the fan revs up, then powers off a few seconds later.
From what I understand this is indicitive of a corrupted BootROM. Strangely enough though I can still get into windows, so the computer isn't completely bricked, for now.
Looking for some advice as to what I should do. I did back up my BootROM at some point ( I think when I upgraded the firmware to allow NVME booting), however I don't really know how to proceed fixing this since I can't seem to access any of the MacOS side of the machine, not even recovery mode.
Sorry if this isn't the right thread for this, I figured maybe it would be a good place to start since it seems very likely related to bad BootROM. (I can confirm that the DIAG button won't throw an "EFI_DONE" light, so there is that).