- Apr 20, 2012
- Core i3 8100
- UHD 630
- Mobile Phone
Hi, I just solved the issue.im on 10.15.5 i am working on getting a time machine backup, and copying other files then going back to 10.15.3, things broke since 10.15.4 and tried 10.15.5 to see if possible to fix the graphic issue.
In 10.15.4 you have to add igfxonln=1 boot parameter, so your working 10.15.3 EFI folder will work if you add this to Clover or OpenCore.
In 10.15.5 the things get more difficult, but solvable. You have to use this ig platform ID 3E9B0000 instead of 3E9B0007 and make sure you have a proper Framebuffer connectors patch.
Now I'm writing from 10.15.5, don't give up, you can solve it.
macos catalina 10.15.5 (19F96) hdmi external display black screen · Issue #938 · acidanthera/bugtracker
Lenovo-Air13-IWL "Lilu" (1.4.4) + "WhateverGreen" (1.4) Upgrade to MacOS Catalina 10.15.5 (19F96) HDMI external display black screen! In macOS catalina 10.15.4, the boot paramet...