Hello,
I saw your tutorial and must say its well written. However i already had a freshly made USB install drive so I copied your EFI folder over to my USB install drive and used that to install. Everything installed on the first try! I went on to install the web drives for my GTX 1080 and I now have graphics acceleration.
Im using the Asrock Taichi X99. My question is seeing that i didn't use you raw image for the install, should I follow all the other steps for post-installation?
Also, though I have graphics acceleration, I cannot see the native resolution for my LG B9 4K TV.
I'm running High Sierra Build 10.13.6 (17G66).
Thanks