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acidanthera / bugtracker

Acidanthera Bugtracker
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Can't boot OC on MacBookPro15,1 #2145

Closed startergo closed 1 year ago

startergo commented 1 year ago

I Get this message: image

  Kernel Version:   Darwin 21.6.0
System Firmware Version:    1916.40.8.0.0 (iBridge: 20.16.2032.5.3,0)
  OS Loader Version:    540.120.3~22

OpenCore version: https://github.com/acidanthera/OpenCorePkg/actions/runs/3315447367

Secure boot is set to no security.

For the record I successfully used older OC version on this MacBookPro with older firmware in the past.

vit9696 commented 1 year ago

I suggest you to use Apple BootPicker and just run ctrl+enter. If that does not help, I think you are best to ping @khronokernel & co about this, as I do not have T2 machines myself to help with this.

startergo commented 1 year ago

I tried booting rEFInd and got the same error. I found out that the security was set to medium security. As soon as I disabled it I was able to boot rEFInd and chain load OC. I can swear I tried disabled security with previous firmware. Firmware got updated with latest Monterey update. Reading in this section https://dortania.github.io/OpenCore-Post-Install/universal/security/applesecureboot.html#special-notes-with-securebootmodel It implies that medium security model should boot? @khronokernel ?

khronokernel commented 1 year ago

Regarding the reference to the guide, it implies hardware lacking a genuine T2 chip (ie. pre-T2 Mac, PC) so some of the logic mention would either be different or non-applicable to genuine T2-based Macs.

For your genuine T2 Mac, it requires Secure Boot to be completely disabled to allow unauthorized bootloaders/operating systems to load:

Since OpenCore is not trusted by Apple's firmware (and trust cannot be supplemented manually unfortunately), you will need to keep Secure Boot disabled.

If there's more that needs to be researched, I can examine more closely with a genuine Macmini8,1 next week.