EFI for Dell Latitude 7280 with OpenCore bootloader

• Intel HD 620 iGPU eDP with Backlight Output
• Intel HD 620 iGPU HDMI Output
• Intel HD 620 iGPU Type-C to HDMI Output
• Intel HD 620 iGPU - H264 & HEVC
• ALC256 Internal Speakers
• ALC256 Internal microphone
• ALC256 Combojack headphones
• ALC256 Combojack microphone
• ALC256 HDMI Audio Output
• ALC256 TYPE-C to HDMI Audio Output
• All USB-A 3.1 Ports (TYPE-C 3.1 Included)
• SpeedStep / Sleep / Wake
• HID Key PWRB & SLPB
• I2C ALPS Touchpad with gesture
• Keyboard (PS2-Internal) with backlight
• Brightness Key
• F11 Print Screen Key
• F1 & F2 & F3 Sound Key
• Wi-Fi and Bluetooth BCM94352Z (DELL DW1560) Module
• Lan Intel I219-LM
• SSD NVME Slot-1 PciE
• Micro SD Cardreader
• WebCam (USB-Internal)
• All Sensors CPU, IGPU, BATTERY, NVME, FAN
• ACPI Battery
• NVRAM (Native)
• Recovery (macOS) boot from OpenCore
• Windows 11 boot from OpenCore

• Usb port mapping performed (with port HS08 for touchscreen model)
• SSDT-Hack Essential patch

Open terminal and run install.sh from TOOLS EFI MOD/ComboJack_Installer. After reboot insert jack and appears this image

See ioreg for more clarification

• Read the Dortania guide for creating your USB from Windows or macOS
• Guide Dortania - USB creation

• SATA Operation : AHCI
• Fastboot : Minimal
• Integrated NIC : Enable

• Secure Boot
• Absolute
• Intel SGX
• Wake on AC
• Wake on Dell USB-C Dock
• Enable UEFI Network Stack
• CFG lock and DVMT: is necessary if you use this EFI.

For set CFG LOCK Disabled

setup_var 0x4ED 0x0

(After this mod set false the quirks AppleXcpmCfgLock)

For set DVMT PRE Allocated to 64 MB

setup_var 0x795 0x2

For set DVMT Total GFX Mem to MAX

setup_var 0x796 0x3

(After the DVMT Mod remove from igpu patch the string framebuffer-fbmem and framebuffer-stolenmem)

• Apple for macOS.
• Acidanthera for OpenCore and all the lovely hackintosh work.
• Juico for fix Alps i2c touchpad.