Ok, so to be clear I would enter 0x0300983E right? Because I have to enter it backwards?Hi there.
I think you are using the iGPU ID for the mobile version. As you are using iMac19,1 perhaps give 3E980003 a try.
I believe the value @P1LGRIM gave you - 3E9B0007 - is for MacMini8,1 or iMac19,2 - but I'm not the expert - so make your choice etc.
Yes generally I stick with a plain text editor. Ok I gave the base64 that you provided a shot, I am able to boot now. However, I'm still registering only 7MB on the graphics.That's certainly correct reverse byte order technique but I wouldn't go jumbling figures if I could avoid it. I believe it is recorded as Base64, not HEX.
What are you using to edit your config.plist?
For example, in config.plist using a plain text-editor, you would enter "PpgAAw=="
If you are brave, and many tell you not to but I'm a fan, use OpenCore Configurator and just enter the value you want in the "DeviceProperties" tab. If you check the Tools menu you will find a HEX Converter calcuator to verify the value.
Also to note: PpgABw== also allows boot but has the same issue of 7MB. I did check the bios and my DVMT is set to 64. I'll double check the MRS but I'm fairly confident I had already done that.Great
Next check your BIOS has a DVMT value of 64 or higher for the iGPU.
Then go for NVRAM.
Best guide out there for our motherboard is @pastrychef 's here.
Also @CaseySJ has a great concise MSR Unlocking guide here.
Both require work. Personally I haven't needed to do either, but I think I'm an exception rather than the rule. I still use "Emulation" of NVRAM using the special Clover builds by @MacMan and have had zero problems.
