This repository contains the OpenCore EFI to install macOS Monterey on the HP EliteDesk 800 G2 Desktop Mini PC (35W). Based on randyzhong version.

Here is my EliteDesk 800 G2 DM 35W specs:

• Product Number: CZC6099PCM
• Product Name: HP EliteDesk 800 G2 DM 35W
• BIOS: 02.53 Rev.A (31 May 2021)

• CPU: Intel® Core i5-6500T @ 2.50 GHz processor
• GPU: Integrated Intel® HD Graphics 530 (2 DisplayPorts + 1 VGA Port)
• Memory: 1 x 8GB DDR4 2133MHz
• Storage: KINGSTON SA2000M8500G
• LAN: Intel® I219-LM GbE
• WLAN: Intel® 8260 802.11ac wireless M.2 with Bluetooth
• Audio: Realtec ALC221 Audio Codec (all ports are stereo, 1 internal speaker, 1 front headphone, 1 front CITA port)

To start, set BIOS to defaults. Then insure:

• Advanced -> Boot Options

  • Disable Fast Boot
  • Disable CD-ROM Boot
  • Enable USB Storage Boot
  • Disable Network (PXE) Boot

• Advanced -> Secure Boot Configuration

  • Select Legacy Support Enable and Secure Boot Disable, press F10 to save changes, system will reboot and lead you to Secure Boot and ask you to input a 4 digits security code for authorization, type in the code shows on the screen and enter to reboot and then press F10 again to enter BIOS configuration

• Advanced -> System Options

  • Disable Virtualization Technology (VTx)
  • Disable Virtualization Technology for Directed I/O (VTd)
  • Enable M.2 SSD if you're using a NVME SSD
  • Check M.2 WLAN/BT
  • Check Allow PCIe/PCI SERR# Interrupt (Uncheck it if have interruption issues)

• Disable Wake on LAN
• Set Video memory size to 64MB or larger
• Disable LAN/WLAN Auto Switching
• Disable Wake on WLAN

• Enable all if no specific reasons.

• Disable Extended Idle Power States

• Configure Option ROM Launch Policy to All UEI

Press F10 to save changes.

• macOS Monterey 12.1

• OpenCore 0.7.7

• AirportItlwm (2.0.0)
• AppleALC (1.7.0)
• BluetoothFixup.kext (2.6.1)
• CPUFriend.kext (1.2.4)
• IntelBluetoothFirmware (2.0.1)
• IntelMausi.kext (1.0.7)
• Lilu.kext (1.6.0)
• NVMEFix (1.0.9)
• RTCMemoryFixup.kext (1.0.7)
• SMCSuperIO.kext (1.247)
• SMCProcessor.kext (1.2.7)
• USBPorts.kext (1.0)
• VirtualSMC.kext (1.2.9)
• WhateverGreen.kext (1.5.8)

USB 2.0 Device

• HS01: Back left up USB2
• HS02: Back left down USB2
• HS03: Front Left USB2
• HS04: Back right down USB2
• HS05: Back right up USB2
• HS13: Front right USB2

USB 3.0 Device

• SS01: Back left up USB3
• SS02: Back left down USB3
• SS03: Front left USB3
• SS04: Back right down USB3
• SS05: Back right up USB3
• SS08: Front right USB3

Type-C

• HS09: Front Type-C

Bluetooth

• HS07: Internal Intel Bluetooth

• VGA port is not supported
• Front Headphone/Mic combo jack is not working
• Sleep is not working (black screen when trying to wake it)
• Upgrades face one time Real-Time Clock (RTC) Power loss (005) error, safely ignore it. When upgrade is finished, no RTC erros on normal reboot
• Bluetooth breaks if you turn it off and on and sometimes goes mad, in those cases reboot to make it work again

Thanks to randyzhong and his setup.