@Wincohax,
Lilu + some Plug-in's should get most things working for you
- WhatEverGreen for IGPU + DGPU
- AppeALC for the Audio
- AirportBrcmFixup for WiFi
Make sure to use the correct SMBIOS (iMac18,X)
You will need to configure your IGPU as Headless using the correct PlatformID.
This guide covers installing and configuring Lilu + popular Plugin's :-
An iDiot's Guide To Lilu and its Plug-in's Last Update: 22nd Jan 2021 (Add note about OpenCore config.plist modifications) About this Guide Note: This guide was written when Clover was the boot loader of choice as such the config.plist examples in this guide are mostley Clover specific ... if...
www.tonymacx86.com
That guide also has the links to the Bluetooth kexts you will need in the WiFi section.
For Intel NIC use this kext :-
OS X driver for Intel onboard LAN. Contribute to Mieze/IntelMausiEthernet development by creating an account on GitHub.
github.com
Be sure to Install kexts correctly .. if your not sure how see this guide :-
Installing 3rd Party Kexts in /Library/Extensions Note: This guide was originally written to support MacOS Mojave and older versions (< r5200) of the Clover boot-loader. The methods detailed here are now considered legacy methods and should only used with older versions of MacOS as detailed...
www.tonymacx86.com
You will need to configure your USB ports, see this guide for more info :-
However those kexts move things around and your IOReg output reflects that. :) I went back and just followed your guide. Thank you. High Sierra on my Sabertooth x79 is working with all USB. IOReg shows the correct number of HPxx USB2 ports. I used uia_exclude to remove the extra HPxx ports...
www.tonymacx86.com
Make sure to configure CPU power Management correctly using this guide :-
macOS Native CPU/IGPU Power Management Native macOS power management delivers the best combination of processor and graphics performance and efficiency. The ingredients are an installed processor XCPM enabling ssdt or correctly configured Clover setting, a compatible system definition and the...
www.tonymacx86.com
All of those guides include examples and images.
Cheers
jay
