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macOS  Monterey 12.3 (21E230) on DELL-OptiPlex-3070

This is the 100% working OpenCore EFI for Dell 3070 MFF with i5-9600k on macOS Monterey 12.3 (21E230)

Dell OptiPlex 3070 with i5-9600k on macOS Monterey 12.3 (21E230)

Ekran Resmi 2022-03-25 13 03 36

Bootloader version: Opencore 0.7.9 macOS version: macOS Monterey 12.3 (21E230)

Hardware Specification

Component Specs
CPU Intel® Core™ i5-9600k
RAM 8gb DDR4 2400MHZ
HDD Samsung EVO 970 NVMe SSD 256GB
iGPU Intel® UHD Graphics 630
Audio Realtek ALC3234
OS macOS Monterey 12.3 (21E230)
Boot OpenCore 0.7.9

Working:

CPU Turbo Boost & Thermal Throttling Audio GPU All USB Ports LAN Airdrop & Airplay Sleep Internal sound and hdmi

Not working:

Display sleep (thinks it's an external monitor)

BIOS Settings

General → Advanced Boot Options: uncheck System Configuration → SATA Operation: AHCI Secure Boot → Secure Boot Enable: Disabled Intel® Software Guard Extensions™ → Intel® SGX™ Enable: Disabled Power Management → Block Sleep: check Virtualization Support → VT for Direct I/O: uncheck

BIOS Settings via GRUB (Optional)

Set Pre-Allocated DVMT to 64M: setup_var 0x8DC 0x02 Disable CFG lock: setup_var 0x5BE 0x00