- Nov 11, 2018
- Gigabyte Z490 Vision D
- RX 580
- Classic Mac
- Mobile Phone
Sorry for the late reply. Are you running Mojave or Catalina?Hey, guys! I've been working on this a couple of days, but its probably an obvious fix. I can boot fine using the install media as a boot manager, but once I get to the step to copy the UEFI files from the USB boot media to the UEFI partition of the OS drive, I just get a blank screen after loading the OS.
I am using the IGPU. HDMI only works for the post phase, and then it stops working as macOS loads, and then only Thunderbolt works. Well, until I try to boot just off the macOS drive and then neither works.
It sounds as if the HDMI frame buffer patch is not installed. If you are using a USB-C to DisplayPort cable connected to one of the Thunderbolt ports, then it's easy: Just follow this guide from Post #1:
If you installed Catalina from the Mini-Guide, then I would be surprised if you're facing this problem because config-IGPU.plist located in the ZIP file has this patch pre-applied.