OptiPlex 7040 Clover
Clover for OptiPlex 7040 with Skylake CPU & GPU
Only fix the Graphics by modify UEFI variables, Ethernet, USB, and sound card with AppleALC, but, is enough! Less is more.
Test with OptiPlex 7040 which using i7-6700, Intel HD Graphics 530, Intel I219LM2 Ethernet, macOS 10.14.5
UEFI Variables
In order to run macOS successfully a number of EFI BIOS variables need to be modified. The included Clover bootloader contains an updated DVMT.efi, which includes a setup_var command to help do just that.
DVMT.efi can be launched from Clover directly by renaming it to Shell64U.efi in the tools folder.
The following variables need to be updated:
| Variable | Offset | Default value | Desired value | Comment |
|---|---|---|---|---|
| CFG Lock | 0xAF | 0x01 (Enabled) | 0x00 (Disabled) | Disable CFG Lock to prevent MSR 0x02 errors on boot |
| DVMT Pre-allocation | 0x350 | 0x01 (32M) | 0x04 (128M) | Increase DVMT pre-allocated size to 128M for 2K+ displays |
Modify DVMT variable step
- Start up and enter
Clover boot menu, selectStart UEFI shell 64and enter.I has replace
Shell64U.efiwithDVMT.efi, so you are runningDVMT.efiin fact. - just run
setup_var 0x350 0x4using this cmd line 中文教程 - fine, the graphics is ok to boot up macOS
- Note: the UEFI Variables will lose after set BOIS to factory default!
FAQ
- SIP enable default ?
Yes. It way enabled by “config.plist/RtVariables/CsrActiveConfig=0x11”.
- What should we do before install macOS system upgrade ? eg.upgrade from 10.14.4 to 10.14.5
Maybe you need to disable SIP before doing upgrade: Set “config.plist/RtVariables/CsrActiveConfig=0x67”.
Credits
- monaive for IGPU relate fix.