OpenCore EFI for DELL OptiPlex 3060M

This build is based on OpenCore v0.6.2

Index

Hardware
Tools
BIOS Settings
Find DVMT pre-alloc and CFG Lock NVRAM store address
Known Issues

Hardware

To make WiFi and handoff work natively I have installed Apple genuine BCM94360CS2 with a m.2 NGFF adapter.

Avoid Samsung PM981 series SSD.

Tools

flashrom - Create backup of the current BIOS
UEFITool - Search and extract setup region of the BIOS
IFRExtractor - Convert the setup region to human readable text

Find DVMT pre-alloc and CFG Lock NVRAM store address

Boot any Linux distro and install flashrom and backup the BIOS.
Open the BIOS image by UEFITool.
Use the search function to search for "DVMT" or "CFG Lock" as text.
Double click the found address at the bottom of UEFITool window.
Open the node and right click on the "PE Image" and select "Extract as is"
Open the file by IFRExtractor and convert the extracted file from step 5 to text format
Open the text file and search for DVMT pre-alloc and CFG Lock
Write down the value store addresses and the value to set. In my case DVMT pre-alloc is at 0x8DC and the 64MB option value is 0x2. CFG Lock is at 0x5BE and disabled flag is 0x0.

BIOS Settings

Load default settings and disable VT-d.

CFG Lock

Boot the OpenCore EFI and select modGRUBShell. Enter the following command when the grub> prompt appears.

grub> setup_var 0x5BE 0x0

DVMT pre-alloc

If you wish to connect your hackintosh to a 4K display, you must set the DVMT pre-alloc value to 64MB+. Otherwise you are fine with the framebuffer-stolenmem patch.