Issues with clean new install of Catalina 10.15.4.
@CaseySJ
I have a system very similar to yours (Z390designare+i9900+5700XT+64GB+Samsung970 1tb).
I have installed new copy (downloaded on my Mac) of 10.15.4 from scratch using OpenCore 0.5.6.
The system is booting fine. I haven't checked yet if all the USB ports were visible. I am connecting via ethernet and for some reason have bluetooth working (I thought it was not supposed to work along with the Wifi).
Unfortunately the Thunderbolt does not seem to work.
When looking at System report under Thunderbolt. I am getting "Thunderbolt no hardware". I would expect to see something like on my MacBook Pro : Thunderbolt bus. Correct me if I am wrong.
I am using your hot-plug aml file SSDT-Z390-DESIGNARE-TB3HP-V4.aml
Any idea on how to solve the issue? note that I am a newbie.
Forgot to mention that I made all of necessary bios modifications:
VT-d & CSM disabled Thunderbolt no-security Thunderbolt USB enabled.
Thanks for any help
Eric