Hi guys, I have a problem and it's driving me crazy. I just recently did a clean install of sierra from El Capitan, and I use to have my Radeon 7850 AMD which was working fine on El Capitan. However, now when I boot with attached GFX card, it freezes on black screen with Apple logo scattered on Sierra.
I have tried installing multiple kexts (AMD4000controller, AMD7000controller, ATI7000controller), whatevergreen, and even tried modifying the frame buffer using this
guide with no success. They all result in same black screen freeze with Apple logo scattered. I originally used Chameleon when I was on El Capitan but now am using Clover. I tried using with/without AT inject with different frame buffers, nada.
Another thing that was weird was, when I originally installed Sierra, the GFX was not recognized until a kext was installed.
When i boot with -v, the last line is giosscreenlock or something like that. However, if I boot in safe mode, my GFX works in dual screen but very laggy with white transitions.
Any help would be appreciated. Thanks in advance!
GFX and my BIOS decode images below