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I have the same issue with Dell T7910.

Updated to Sonoma 14.1 went smooth with O.C-0.9.6

Updated to 13.3.1 without any issue. Dell T7910 + RX6950XT + OC-0.9.0

This is an old EFI version that is not supported in Monterey/Ventura. You should try to use a new EFI as the link below which avoids kernel panic "non-monotonic time" during Monterey/Ventura booting. https://github.com/BillDH2k/Hackintosh-DELL-T5810-OpenCore

@twanhines , yes it works well on macOS Ventura 13.1

There is no problem with the dual CPU for hackintosh installation. I have successfully installed macOS Ventura 13.1 on Dell workstation T7910 2x E5-2699v4, it works perfectly without any problem.

Update went smooth on Dell workstation T7910 with OC 0.8.6

Updated macOS Ventura 13.0.1 smoothly on Dell workstation T7910 (OC-0.8.6)

You can try to add the cpus=1 boot flag. I have had the same problem, it was KP without this boot flag.

Hello Edhawk, Thank you very much for your help. I will be using your revised EFI to install Monterey and let you know the result very soon.

I am using MacPro7,1 for Big Sur. The attached files are the EFI and error when I installed Monterrey. Please give me your advice. Thank you!

Hello, have you solved that problem with Monterey? I have the same problem, my Dell T7910 works well with Bigsur, but can not install Monterey.

I would like to share my config if it helps anyone else. Model - Dell Precision Tower 7910 Processor - 2x E5-2699 v4 Memory - 256GB (8x32GB) Samsung DDR4 2130MHz Graphics Card - RX5700XT Wi-Fi/BT - Broadcom BCM94360CD * Big Sur 11.6.5 * Cinebench R23 Score: 23237 * Geekbench 5 Score...

Hello, Have you fixed your problem installing Monterey on Dell T5810?

You should also try to set "cpus=1" at boot-args, since your PC is dell T5810 which has 1 CPU support.

I have followed this topic to patch the CPU Power Management. https://www.insanelymac.com/forum/topic/335860-guide-2018-z820-high-sierra-the-great-guide-sucess/

I think you should try to set "DummyPowerManagement=True" after you updated, then you have to patch the AppleIntelCPUPowerManagement. I have done to install Monterey 12.1 (beta 2) on my desktop Dell workstation T5600.

My CPU is a Sandy-Bridge (Intel xeon 2690v1). It works fine with MacOS Monterey 12.0.1 and 12.1. Note that, Sandy-Bridge CPU is not support in Monterey 12.1, but it already solved by adding BoardID skip and VMM kernel patch. Here is my EFI

It works well on my PC with Monterey 12.1

Update went smooth with OpenCore 0.75