I have been running Sierra for a while now, with no problems whatsoever, but after installing the 10.12.4 update, the graphics got all weird and flashing. I tried updating clover, but then my pc wouldn't boot anymore at all... And of course I was to stubborn to make a backup... Now things look like this:
It constantly switches from that to normal, every time something on the screen moves... Does anybody have any idea?
3,19 GHz Intel Core i5
16 GB memory
Sapphire Radeon 6570 2GB
Not sure what motherboard and stuff but thats probably not causing this problem anyway
Also, there is no video playback. So definitely something graphics related. Edit 2: Video playback started working again randomly? Still weird flashing though. What seems to be happening with the flashing is, that red and blue constantly switch, but green remains the same.
Oops, no picture. Here it is: