@CaseySJ I have 2 issues that maybe you can help me.
As per my signature I have the same motherboard than you, different processor and video card. Also to note is that I have an NZXT internal USB2.1 usb so that I can connect the USB 2.00/USB3.1 front panel as well as the NZXT Kraken USB header and the USB cable for the bluetooth/wifi combo genuine Apple card. Without this NZXT internal hub, I am short of USB 2.0 headers.
Also my SDD config is 1 x WD Black SN70 1TB NVMe SSD boot drive, 1 x Samsung Evo Plus 1TB NVMe SSD which current hold a back up of the WD (EFI on the Samsung is empty), and 1 X WD 1T classic HDD which hold a previous 10.15.4 backup (EFI empty as well).
Note that I am on 10.15.6.
I have followed your guide and used your SSDTs, kexts, config plist and everything is sort of running smoothly except the following:
- startup disk: somehow I can't have opencore booting the right SSD. I am not sure if it opencore or MacOs. I can change the startup disk in MacOS preferences (I unlock the panel, set the startup disk, lock the panel). I have double checked that if I reopen the preferences and check the startup disk, the right one is selected and it is. However when I restart, opencore keeps pointing at the wrong drive. In opencore picker, the drives are listed alphabetically and the first one on the list is the classing HDD, followed by WD Black NVMe (which is the one to boot from). I can't find anything on the net. Maybe because opencore is too new and there is no enough information. And if I select the WD and boot the system, once it is up and running and I go to check the startup disk, it is empty. Nothing is selecting.