OpenCore EFI

A prebuilt EFI for installing macOS Big Sur on the HP 280 G1.

(If you need to make any changes to the EFI, follow this guide here.)

OpenCore Version: 1.0.0 from May 9, 2024.

IMPORTANT WARNING

To avoid problems i removed the SMBIOS Serials, you can generate yours by following this guide.

It's really easy and it doesn't take long.

Working features:

• Power Management
• QE/CI of Intel HD 4400
• Audio
• Ethernet
• Mapped USBs
• Android USB Tethering support

Bugs

• Sleep causes screen flickering.
• Glitching video with trasparency effects, photos and Siri.

Note: You might not have those issues, it could be me for using a DVI-D to VGA adapter.

Specifications of the PC

Component	Model
Desktop	HP 280 G1 MT
Chipset	Intel H81
CPU	Intel(R) Core i3-4160 3.60GHz - Haswell
iGPU	Intel HD Graphics 4400 - 1GB
USB Ports	Front: 2x USB 2.0 - Back: 4x USB 2.0 + 2x USB 3.0
Audio Codec	RealTek HD Audio - ALC221
Ethernet Controller	RealTek RTL8168/8111 PCI-E Gigabit Ethernet NIC

ACPI Tables

Name	Description
SSDT-PLUG	For fixing Power Management
SSDT-EC	For faking the Embedded Controller
SSDT-EHCx_OFF	Needed to remove the extra USBs from the mapping

Included Drivers:

Drivers	Description
HfsPlus	Needed to show HFS drives.
OpenRuntime	Required to boot the EFI.
OpenCanopy	Used to load the boot GUI.
ResetNvramEntry	Needed to reset the system's NVRAM. (Optional)
FirmwareSettingsEntry	Used to reboot into the system's UEFI settings. (Optional)

These drivers are included with the OpenCore package, you can update them by downloading it here.

Installed Kexts

Kext	Description
AppleALC	Required for patching AppleHDA and make the audio work.
HoRNDIS	Used for Android USB Tethering (Optional).
Lilu	Needed to load kexts like AppleALC, WhateverGreen, VirtualSMC, etc.
RealtekRTL8111	Needed to make Ethernet work.
VirtualSMC	Emulates the Mac's SMC chip, required to boot the OS.
SMCProcessor	Used to check the CPU temperatures. (Optional)
SMCSuperIO	Used to check the fans speeds. (Optional)
USBMap	Needed for USB ports to work.
WhateverGreen	Needed for GPUs patching and QE/CI support.

Credits

• Dortania - For the amazing OpenCore guides.
• sonic89 - For helping me a lot building this EFI, without him this wouldn't exist.
• Krazy-Killa from /r/Hackintosh Paradise - For helping me with the QE/CI