This may be a stretch but I’m wondering if anyone is having issues using Opencore on the GA-Z77X UP5 TH MB?
Since upgrading to 0.6.7 the issue seems that the MB cannot use the EFI from any other drive to boot other than the installed NvME drive despite overriding in BIOS or via F12 to select boot drive at startup.
This seems to be confirmed as when the NvME drive (which like all of us is on a PCie card) is removed any other OC based drive returns a unable to boot / insert bootable media error.
It was working previously or I wouldn’t have been able to install OC Big Sur off a USB drive To a test SSD (not NvME). The NvME main drive runs Mojave.
An associated problem seems that I am locked out of resetting / clearing NVRAM excepting via the CMD+OPT+P+R at OSX start up. I am unsure if this is contributing factor to the boot issue. I raise this issue as when updating OC from 0.6.6 to 0.6.7 the updated OC wasn’t recognised until a NVRAM reset occurred which was done with the OC picker and boot EFI occurred via a 0.6.7 OC test USB. That EFI folder was eventually transferred to the NvME SSD main drive.
The issues were realised when trying to update OC to 0.6.8.
I‘m wondering if it may be due to some interaction between the modded BIOS, a NVRAM setting, and changes with the 0.6.8 Opencore? Yet I may be clutching at straws.
Any help or ideas gratefully accepted.
@Nortagawa as your the last person with BIOS editing skills to reply to this thread I’d hope you Would have some insight.