Hi, I have some issues with my Mac mini running High Sierra (10.13.6) and displays connected via either HDMI or DP. In both cases I get black boxes (see attached screenshots) where other stuff should be. Everything works fine if I connect to another display via HDMI to DVI cable. I tried different HDMI/DP cables (length and vendor).
I also did a test with El Capitan and everything works, so there is nothing wrong with the actual ports.
Anybody has an idea on how to fix this? Running El Capitan is currently not an option.
I also did a test with El Capitan and everything works, so there is nothing wrong with the actual ports.
Anybody has an idea on how to fix this? Running El Capitan is currently not an option.
