Don't worry I made a generic bootable EFI (with hot patches) for Zenbook. That should work way better than Khalidthami's previous EFI.
Link : https://github.com/FlasHRender/Zenbook-S-UX391UA-hackintosh/tree/master/EFI Bootable generic
Note its a starting place for your EFI. Everything won't...
I have created a GitHub repo for Zenbook S UX391UA. The newer whiskey lake zenbook and UX391UA have a lot in common and could help many Zenbook users. The repo by hieplpvip for zenbook's does not work well with the newer overall architecture of our zenbooks. There is difference between all...
So here you go I made a kext with random pwd:
sudo chown root:wheel itlwm.kext
sudo kextload itlwm.kext
Credit for the kext: https://github.com/zxystd/itlwm
If you are using opencore try my device property for UHD620 for gpu: