So, I'm running 10.7.5 on a 3 year old Mac Pro. About a week ago, I was using one of my two monitors in the living room attached to a different computer. I did a software update while only using one monitor on the Mac Pro, only to find that the one left plugged into the Mac will not work with the second plugged in. It is not a monitor problem, as it works with every other computer in my home. No displays are detected, I've rebooted several times, and this is only the beginning of the problems.
Then, I find that the display will not sleep. If I put the machine to sleep, the only difference is that the mouse is inactive until I click it or hit something on the keyboard.
Then, I try to watch a movie using VLC, only to have an error message come up that my Mac doesn't have Quartz Extreme acceleration, in the error details: "failed to create video output".
Also, if I unplug the monitor that was moved (not plugged into the Pro for a while), then restart with only the crappy monitor (the one that I was using on the Pro solely), nothing is displayed past the grey startup screen.
Any ideas?
(Thanks in advance, I've creeped the forums for ages and have always found what I was looking for, but this is baffling.)
Then, I find that the display will not sleep. If I put the machine to sleep, the only difference is that the mouse is inactive until I click it or hit something on the keyboard.
Then, I try to watch a movie using VLC, only to have an error message come up that my Mac doesn't have Quartz Extreme acceleration, in the error details: "failed to create video output".
Also, if I unplug the monitor that was moved (not plugged into the Pro for a while), then restart with only the crappy monitor (the one that I was using on the Pro solely), nothing is displayed past the grey startup screen.
Any ideas?
(Thanks in advance, I've creeped the forums for ages and have always found what I was looking for, but this is baffling.)