This repository contains a generic OpenCore based EFI folder for booting macOS on HP EliteDesk 800 G4 Mini computers.
This EFI is based off the excellent work of deeveedee over at insanelymac.
For more information on how to install macOS on a HP EliteDesk 800 G4 Mini please consult the linked thread above.
For convenience sake this repository includes the recommended UEFI configuration and additional DeviceProperties configurations in the EXTRAS folder.
Currently based on OpenCore 1.0.7, covering macOS Catalina through Tahoe.
Features of this EFI:
- Working macOS boot
- Working BootCamp
- Graphical boot picker via OpenCanopy with BigSurFlat theme
- 15 port limit of BigSur is complied with by disabling the internal ports for the WiFi/BT module
- USB port map is compatible with both macOS Tahoe and earlier releases
- Per-OS boot entry icons (Windows 10, Windows 11, Linux) via OpenCanopy flavours
- Working audio on every supported macOS: AppleALC up to Sequoia, VoodooHDA on Tahoe, selected automatically
- Disabled boot chime
Before using this EFI, replace the following PlatformInfo > Generic values in config.plist with your own *use GenSMBIOS): MLB, ROM, SystemSerialNumber and SystemUUID.
Then apply the UEFI settings from the UEFI configuration document. Intel ME must be enabled for proper sleep/wake of the UHD 630.
Apple removed AppleHDA in macOS Tahoe, so AppleALC.kext no longer produces audio there. This EFI ships VoodooHDA.kext alongside it as a replacement, and no configuration is needed - the two are scoped by macOS version and never both drive the codec:
| Kext | MinKernel |
MaxKernel |
Active on |
|---|---|---|---|
| AppleALC.kext | 12.0.0 |
- | Catalina … Sequoia |
| VoodooHDA.kext | 25.0.0 |
- | Tahoe and newer |
MinKernel 25.0.0 is what keeps them apart: VoodooHDA attaches directly to the HDA PCI device, so on Sequoia and older it would compete with AppleHDAController - the version bound stops it from ever being injected there.
AppleALC needs no MaxKernel in return, because it works by patching AppleHDA; with AppleHDA gone in Tahoe it simply does nothing and never touches the device VoodooHDA claims. Leaving it loaded also means audio comes straight back if you ever restore AppleHDA on Tahoe via OCLP - in that case, disable VoodooHDA.kext, since AppleHDAController and VoodooHDA would then both want the same PCI device.
Two optional extras:
- Volume and input gain control - install VoodooHDA.prefPane to
/Library/PreferencePanes/. Without it you get working audio but no fine-grained mixer control. - Layout matching - VoodooHDA auto-detects the Conexant CX20632 by default, which is the tested configuration. If you would rather have it follow the same AppleALC layout this EFI uses, add
voodoo-layout-id=<14000000>to DeviceProperties > Add > PciRoot(0x0)/Pci(0x1F,0x3).
VoodooHDA is GPLv2 and is not an Acidanthera project - sources are at CloverHackyColor/VoodooHDA.
This EFI ships with SIP fully enabled (NVRAM > Add > 7C436110-… > csr-active-config = <00000000>) and does not bundle OpenCore Legacy Patcher. OCLP cannot be shipped inside an EFI folder - it is a macOS application that builds its own OpenCore EFI and root-patches the installed system volume, which breaks the APFS snapshot seal and requires AMFI and parts of SIP to be disabled.
The guide author recommends against it on production machines for that reason, and the VoodooHDA route above avoids needing it for audio.
If you do need a different SIP level, change csr-active-config:
| Value | Meaning |
|---|---|
<00000000> |
SIP fully enabled (default in this EFI) |
<01000000> |
Allow untrusted kexts - needed only to install VoodooHDA into /Library/Extensions instead of injecting it |
<03080000> |
Required by OCLP root patches |
Injecting VoodooHDA via OpenCore as described above keeps SIP fully enabled, so <00000000> is fine.
