I just had this problem with fresh install (Mojave) after exact steps shown in Macman's build (
https://www.tonymacx86.com/threads/...updated-for-10-14-6-and-nvram-support.275272/), which is:
- Intel i9-9900k
- Asus TUF z390 Pro Gaming
I am running a Gigabyte RX580 with two DisplayPort monitors, one 4K@60Hz, one 1k@60Hz.
I have Lilu and WhateverGreen kexts in addition to some others via Macman's OctoTUF.mb (multibeast config file). Everything hardware-wise works perfect.
View attachment 464349
The only problem remaining for me is JPEG Preview doesn't work; however, I just fixed it by going into the UEFI/bios and putting the integrated graphics into headless mode.
By default, the motherboard's Integrated Graphics setting is set to AUTO. I changed it to PCIE and enabled Multi-monitor. I'm sorry I can't remember the exact bios setting names, but it is Primary graphics = PCIE and Multi-monitor = ENABLED. It is likely this for most z390 motherboards, under Advanced settings in the bios.
NOTE: theNoVPAJpeg kext is deprecated:
https://github.com/vulgo/NoVPAJpeg/releases