No Graphics Acceleration and 7MB of VRAM on Comet Lake UHD 620 (Intel Core i7-10510U 10th Generation) Big Sur

My first real attempt at making a Hackintosh, Decided to try installing Big Sur since it might be the last one I can get to support my dGPU.

I have a 2020 Dell Vostro 3590, CPU: Intel Core i7-10510U (10th Generation) iGPU: Intel UHD 620 Graphics* RAM: 8GB DDR4 Audio: Realtek ALC3204 (ALC236) dGPU: AMD Radeon 610 Series** WiFi: Intel Dual Band Wireless-AC 3165 SSD: Samsung 120GB

I've got most things working: Booting, Sound, Keyboard/Mouse, USB (Not sure if I have 3.0 working yet), Intel WiFi Card, Bluetooth, and more.

I don't have Graphics Acceleration, So no transparency on the dock, really slow animations for minimizing windows and opening Launchpad, etc. I'm also stuck on 7MB of VRAM as far I can tell. My Laptop's UEFI doesn't let me change the DVMT-prealloc for the iGPU, it seems to be set to 32MB. Also I can't change the Brightness but I figure that will come with setting up the iGPU properly.

I've followed Dortania's guide for everything, which mentions that a UHD 620 in a Comet Lake CPU needs deviceid to set to 9B3E0000, but the Whatevergreen framebuffer patching guide says that this was only needed for a 9th Gen Coffee Lake Refresh, and that after MacOS 10.14.4 it isn't necessary. Setting deviceid to 9B3E0000 causes issues while booting for me.

  • I'm 98% sure it's a UHD 620, everything I've read said that it's a 620. But in Linux it shows up as "Intel 10th Generation Graphics (GT2)" which normally means a UHD 630. I've tried Framebuffer for the UHD 630, Intel HD Graphics CFL CRB, and a couple of the Iris Plus ones, (All Mobile, I haven't tried any Desktop ones.) but none seem to make Graphics acceleration work.

** My dGPU (AMD Radeon 610 series) is another point of confusion. In Linux it shows up as a "AMD Radeon R5 M435" a 1st gen GCN card. But Dell, Windows and everything else says that the Radeon 610 series is probably a Polaris 10/20 card.

submitted by /u/creeper1074
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