My wife always blames me. Now I'm just going to blame it on electric flatulence.
A big thank you to you, and you just make my life rock n roll !!
Long story short, I have been messing around with the OC from 0.6.0 to 0.7.1 and tried every single version, it takes me almost a few months and couldn't get it solved but I can boot into the OS with dual screen ( 1 x DP; 1 x HDMI ) However, none of my USB ports work. (the attached EFI-066) ... Many Thanks for your postsssss and I have learn a lot from you..
I got my GA-H55M-UD2H running 10.14.6 Mojave on cloverR5122; it works fine for last 2 years.
As of the newest Catalina & BigSur are so hot, I was so hitch to get it running on this old nice PC!
Now, I can do triple boot with your EFI and I just put my DSDT.aml and replaced your one, update the SMBIOS with MacPro5,1 and it boots perfectly on everything ( at least most of the stuffs I need is working now ) - million thanks ! ( as I was using MacPro6,1 before )
* I am not a developer nor programmer so I have zero coding experience, but now at least all my "important" function works !
Detail spec: H55M-UD2H - Xeon X3450 | 32GB | R9-270x - 2GB
OS:
Win10 on intel SSD
Catalina on Samsung EVO850 SSD - as boot disc: OC 0.6.5
BigSur on NVME Samsung EVO970 with a PCIe x 4 converter
Things are working:
BlueTooth;
USB ports; From the IORegistryExplorer shows only 4 ports working;
but at least I can use my USB keyboard and USB mouse ha ha ha
Onboard NIC ( I don't need wifi )
Internal sound card - best is the headphone jack is working so that I can switch between my external SB omni surround
Still are some minor things:
- like my NVME disk show up in yellow color;
- My R9-270x showing as R9-370X (that's good a free upgrade !)
The first EFI is from deeveedee's (credit goes to him !) and the EFI-066 is a newest version I try to did it myself. Can boots into the OS-bigsur but no USB ports is working...