UNC patch doesn't work on China X79 motherboards

[haingo87]

I and some people using China X79 motherboards found that UNC patch doesn't work. Our motherboards vary from single socket to dual socket so the behaviors are different:

• With single CPU setup (either on single socket or dual socket board), we get kernel panic (IOPCIFamily) or restart during boot. The solution is removing all unused cores from DSDT in order boot into macOS/installer successfully
• With dual CPU setup, we always get stuck at [EB|#LOG:EXITBS:START] (even after following troubleshooting on your page here https://dortania.github.io/OpenCore-Install-Guide/troubleshooting/extended/kernel-issues.html#stuck-on-eb-log-exitbs-start)

This doesn't seem to be issue with good-brand-name mother boards (https://github.com/BrushXue/EP2C602-4LD16-E5-2667v2-Hackintosh, https://github.com/kevinisaacperez/DellT5600Hackintosh). China X99 dual socket motherboards don't have this issue either (https://github.com/markkpa/x99-t8d-and-x99-f8d-Opencore-Hackintosh). Very likely it's a common issue among China X79 motherboards only.

Here is the info of my rigs:

• Mobo: Chinsese X79 dual CPU
• CPU: Xeon E5 2689 x2
• GPU: Gigabyte RX 480 4GB
• Ram: 4 x 16GB 1600Mhz

Please find my EFI, DSDT and log file in the attachment for more details you might need.

opencore-2021-12-26-055104.txt EFI.zip DSDT.zip

[robcodemax]

I agree... Mostly it's a issue with Chinese Dual CPU motherboard...