OptiPlex 7050 Clover

• Specify
  • CPU: i7-7700
  • Audio: ALC255
  • Graphics: HD630
  • Monitor: DP 4K monitor

Clover for OptiPlex 7050 with Kaby Lake CPU & IGPU

Only fix the Graphics by modify UEFI variables, Ethernet, USB, and sound card with AppleALC, but, is enough! Less is more.

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	0x4ED	0x01 (Enabled)	0x00 (Disabled)	Disable CFG Lock to prevent MSR 0x02 errors on boot
DVMT Pre-allocation	0x795	0x01 (32M)	0x04 (128M)	Increase DVMT pre-allocated size to 128M for 2K+ displays

Modify DVMT variable step

1. Start up and enter Clover boot menu, select Start UEFI shell 64 and enter.

   I has replace Shell64U.ef with DVMT.efi, so you are running DVMT.efi in fact.

2. just run setup_var 0x795 0x4 using this cmd line

3. fine, the graphics is ok to boot up macOS

4. Note: the UEFI Variables will lose after set BOIS to factory default!

FAQ

1. SIP enable default ?

   Yes. It way enabled by "config.plist/RtVariables/CsrActiveConfig=0x11".

2. 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

• Apple
• Dell