https://forums.macrumors.com/threads/1568657/
Dammit! Used this before on a 22" late 2012 w/ mavericks. Just setup a custom 3840x2160 hidpi (1920x1080) and after selecting it as resolution through switchresx panel the screen went black. If I hold the power button down I get the grey bootdown screen and sound, but then nothing again. F*&k me. Anyway to get to some sort of 'safe mode' to remove the switch res x?? This isn't something apple support is going to help me with, and switchresx has no support (one guy team apparently.)
Dammit! Used this before on a 22" late 2012 w/ mavericks. Just setup a custom 3840x2160 hidpi (1920x1080) and after selecting it as resolution through switchresx panel the screen went black. If I hold the power button down I get the grey bootdown screen and sound, but then nothing again. F*&k me. Anyway to get to some sort of 'safe mode' to remove the switch res x?? This isn't something apple support is going to help me with, and switchresx has no support (one guy team apparently.)