Hello everyone,
I’m running macOS Sequoia 15.5 on my HP EliteDesk 800 G4 SFF using OpenCore.
Specs:
CPU: Intel Core i7-8700 (Coffee Lake, 6 cores / 12 threads)
iGPU: Intel UHD 630 (no dedicated GPU)
RAM: 32 GB DDR4
Storage: 2 × NVMe SSDs (1 × Windows 11, 1 × macOS)
SMBIOS currently: iMac19,1 (working fine)
Problem
I want to prepare for macOS Tahoe, so I tried changing SMBIOS to iMac20,1.
After reboot, all USB stopped working (no keyboard or mouse detected).
What I tried
Disabled USBMap.kext and enabled XhciPortLimit + USBInjectAll → didn’t work.
Created a UIAC.aml → didn’t work.
Remapped my USB ports from Windows, generated a custom kext, disabled XhciPortLimit and USBInjectAll→ still nothing.
Tested SMBIOS iMac20,2 → same issue.
Considered MacPro7,1 SMBIOS, but didn’t try because of possible iGPU/UHD630 issues.
Current status
I reverted to my original EFI with iMac19,2, and everything works normally again.
Questions
- Why does USB completely break with iMac20,x SMBIOS on Coffee Lake?
- Is it possible to make iMac20,1 SMBIOS work properly on this hardware, or should I stay on iMac19,1/19,2 and wait for OCLP/Tahoe patches?
Thanks in advance for any help!