Have you tried updating to 10.15.5? In my 2 AMD I have updated without problem from 10.15.4 but in this I have updated (also the kexts) and when starting up the screen remains black.
I am trying to fix but I am not able, always black screen (HDMI, VGA and DVI) ... T_T.
I'm using integrated graphic.
Thank you. Regards.
Have you tried updating to 10.15.5? In my 2 AMD I have updated without problem from 10.15.4 but in this I have updated (also the kexts) and when starting up the screen remains black. I am trying to fix but I am not able, always black screen (HDMI, VGA and DVI) ... T_T. I'm using integrated graphic. Thank you. Regards.