To get 1536MB VRAM and GPU acceleration, I use Clover to inject 8086:0412 device-Id and 0x0d220003 ig-platform-id.
This will only give me 1920*1080@60Hz, so I use Clover to patch AppleIntelFramebufferAzul to modify framebuffer size.
At this point, the display can run at 4K@30Hz, but there are...