This is an OpenCore EFI that allows you to install and boot macOS Monterey on your Dell Precision 5550 (2020)

OpenCore Version: 0.7.4

Disable the following

• VT-d
• TPM
• Secure boot
• Disable CFG Lock (via modGRUBShell)

This EFI was created from scratch using Dortania's vanilla laptop guide with additional info from the Comet Lake setup https://dortania.github.io/OpenCore-Install-Guide/config-laptop.plist/coffee-lake-plus.html#starting-point

You are strongly advised to read the guide fully before using the EFI in this repository. Do not use the EFI as is. You will need to learn how to replace the serial number with GenSMBios and disable cfg lock at the very least.

This is specific to XPS 15 9500 only (along with its sibling models and previous gen).

Select the modGRUBShell option at startup (OpenCore boot selection page). At the grub prompt, enter the following commands (the first line unlocks CFG, the second line unlocks overclocking).

setup_var CpuSetup 0x3e 0x0
setup_var CpuSetup 0xda 0x0
exit

Restart your laptop and boot into the BIOS. Do a factory reset. Now your CFG lock will be disabled. You can confirm that by running the VerifyMSR2 option.

If you update your BIOS, you may need to do this again but so far Dell has been kind to us.

fn+S and fn+B hotkeys are currently used to adjust brightness.