Ok, I'll post in this thread since I do not want to pollute the other thread with a problem that belongs here.
My situation is the following:
A few days ago my system (cMP 5,1) was running OpenCore 0.7.2 (martin's package), Big Sur 11.2.3 on PCIe NVMe, Mojave on internal SSD and Windows 10 on internal SSD (as far as I know it was installed in Legacy mode).
On Monday I decided to update Big Sur on my NVMe to 11.5.2 but I forgot to set the emulate flag in the OpenCore config.plist
This caused an unsuccessful install of 11.5.2 (of-course) an the Mac was stuck in a boot cycle where after rebooting it kept displaying the following message:
View attachment 1829447
After this I booted back into Mojave, wiped the NVMe and Installed Catalina instead (this time setting the emulate flag in the config.plist like I should have done the first time around). All went fine and Catalina is running fine. But I noticed I lost my Windows 10 entry in the OpenCore bootpicker screen. The only entries left are Catalina and Mojave.
I am however able to adress the Windows 10 SSD using Parallels to load it as a 'BootCamp' partition. Everything there is running as it should and I checked again if it was running in Legacy mode and it was.
Now, when logged into Catalina (on the NVMe) and after waking up from sleep, the computer fails to wake up and reboots and gives me the same warning message displayed in the picture above.
Someone hinted me that my bootROM might be affected (I never booted into Windows without OpenCore and as far as I know, Windows always ran in Legacy mode not UEFI).
So I checked my bootROM in system information and saw this:
View attachment 1829450
Now, I know from the las time I updated/flashed the ROM back in 2019 that the Boot ROM should be version 144.0.0.0.0 and not what is displayed here.
So what might be going on here, what likely happened? And can I simply re-flash again to version 144.0.0.0.0 ?