​

https://preview.redd.it/l4foewtgt5y51.png?width=2560&format=png&auto=webp&s=8f1910c4871dad24842b03b9f0797a6a2ede84dd

What's inside

• 10600k CPU
• MSI Z490 GAMING PLUS Motherboard
• 4x16 DDR4 Kingston RAM, 3000 Mhz CL16 (XMP Profile 2)
• EVGA Nvidia 1080ti, disabled for OSX via -wegnoegpu
• A lot of HDDs and SSDs

What works

It's easier to list what's not works:

• Audio (didn't config audio yet, I use external USB sound card, but I'll get into this one day)
• HDMI output via iGPU (working on it at the moment, DP works OOB)

All other things are OOB: USB, sleep, network (but remember that you need to manually select link speed), DP output, iServices, iGPU, even noname USB BT dongle.

Sidecar probably will not work, cause I don't have wireless card, but I don't need it anyway.

Installation process and PSA about RTL8125

Basically followed to the Dortania Opencore guide 1-to-1. Added -wegnoegpu to disable Nvidia GPU. Also don't forget to change boot GPU to iGPU in BIOS.

iGPU settings that works for me (default platform id, but non-standart device-id):

AAPL,ig-platform-id 07009B3E device-id 983E0000 

Display works without device-id, but many apps don't (had errors referred to GPU related thingies)

PSA: how to deal with the Realtek RTL8125 on install

Thing is, RTL8125 with LucyRTL8125Ethernet.kext doesn't work OOB, you need to set link speed manually. It's fairly easy to do after install via Network page in Control panel. But what you can do, if Catalina installer require internet connection, and you obviously don't have access to Control panel yet? Fear not, there is a solution! Open Terminal and type in:

ifconfig 

Find desired Ethernet connection (usually en*, in my case it's en0) and set link speed (100baseTX or 1000baseTX depending on your router):

ifconfig en0 media 100baseTX mediaopt full-duplex 

That's it, you can ping 8.8.8.8 just to make sure that network is up and running now.