Installed Mavericks, now HDMI Monitor is black. Any ideas?
I have a MAC mini from mid 2011. I just installed Mavericks. Now my monitor is black. Using HDMI cable. No adaptors.
Shows up in preferences, but screen is black.
USB monitor is failing completely.
Gone from 3 monitors to one. 😟
Mac mini, OS X Mavericks (10.9)