Lenovo ThinkPad T490 - UDH 620 - iGPU acceleration not working

mikiotty

New member
Joined
Oct 28, 2022
Messages
3
Motherboard
Lenovo T490
CPU
i5 8265U
Graphics
UHD 620 (0x3EA0)
OS X/macOS
12.0.x
Bootloader
  1. OpenCore
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
Hi everyone! I'm trying to install macOS on this Lenovo ThinkPad T490 (specs in the signature), but I can't get iGPU acceleration to work.

I tried following the Dortania guide, setting 00009B3E as platform-id and 9B3E0000 as device id, it freezes just before the login screen with these colors/lines on the screen.
I tried changing the IDs according to Whatevergreen's Intel guide for Whiskey Lake laptops, setting 0900A53E as platform-id and A53E0000 as device-id, same result.
I tried a combination of those, even spoofing Kaby Lake or Coffee Lake UDH620s, 630s and 655. Nothing works. The only way I can reach the desktop is by removing the device-id property, but I don't have GPU acceleration of course.

I tried changing SMBIOS from MacBookPro15,4 to 15,2 or even 14,2. No changes.

I also tried DVMT patching, I can set either 256MB or 512MB in the BIOS, but it doesn't work either.

I'm at a dead end, I've been hackintoshing for 7 years now and I never ever faced an issue like this, furthermore a lot of people on this very laptop configuration have macOS running perfectly since Catalina.
Does anyone have any idea? I'm attaching one of the various plist configurations I tried. Thank you!
IMG_0912.png
 

Attachments

  • config.plist.zip
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EliteMacx86

Administrator
Staff member
Joined
Jul 22, 2018
Messages
4,147
Motherboard
Supermicro X11SPA-T
CPU
Intel Xeon W-3275 28 Core
Graphics
2xAMD RX 580 8GB
OS X/macOS
11.0.x
Bootloader
  1. OpenCore
Mac
  1. Mac mini
  2. MacBook Pro
Mobile Phone
  1. Android
  2. iOS
I also tried DVMT patching, I can set either 256MB or 512MB in the BIOS, but it doesn't work either.
The first thing you should do is flash the latest BIOS.
'm at a dead end, I've been hackintoshing for 7 years now and I never ever faced an issue like this, furthermore a lot of people on this very laptop configuration have macOS running perfectly since Catalina.
It happens. It all depends on the hardware, its limitation, and how well your implementation is.

Does anyone have any idea? I'm attaching one of the various plist configurations I tried. Thank you!
Incomplete PR files attached.
 

mikiotty

New member
Joined
Oct 28, 2022
Messages
3
Motherboard
Lenovo T490
CPU
i5 8265U
Graphics
UHD 620 (0x3EA0)
OS X/macOS
12.0.x
Bootloader
  1. OpenCore
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
The first thing you should do is flash the latest BIOS.

It happens. It all depends on the hardware, its limitation, and how well your implementation is.


Incomplete PR files attached.
It's already on the latest official BIOS (v1.77 and 1.26 for EC). I could try and roll back to a previous version to see if it changes anything.
What files do I need to attach?
Thanks
 

EliteMacx86

Administrator
Staff member
Joined
Jul 22, 2018
Messages
4,147
Motherboard
Supermicro X11SPA-T
CPU
Intel Xeon W-3275 28 Core
Graphics
2xAMD RX 580 8GB
OS X/macOS
11.0.x
Bootloader
  1. OpenCore
Mac
  1. Mac mini
  2. MacBook Pro
Mobile Phone
  1. Android
  2. iOS
It's already on the latest official BIOS (v1.77 and 1.26 for EC). I could try and roll back to a previous version to see if it changes anything.
As you have attempted to unlock DVMT, the best would be to flash the latest stock BIOS to prevent any issues which might appear during diagnostics.
What files do I need to attach?
Read here:
 

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