I was trying to diagnose an issue on my cMPro 5,1 with howling fans that turned out to be bent pins on the backplane.
As part of trying to debug, I failed to be able to invoke diagnostics. I set the startup volume from EFI OCLP to Mojave and tried booting with
As part of trying to debug, I failed to be able to invoke diagnostics. I set the startup volume from EFI OCLP to Mojave and tried booting with
- Depressing "D"
- Depressing Opt-Cmd "D"