When I went to turn on my mac tower, the monitor would not turn on, the power led flashed a little bit, then went off. I googled apple cinema display monitor light blink and found a trick to use scotch tape to cover the middle pin, I tried this, and it seemed to work for now. My display is the older apple cinema with the silver bezel. But I think it might be time for a new monitor, I would like one that will work with my mid 2010 classic mac pro, it is the 2.8 ghz quad core, with 24 gb of ram. i am currently running mavericks 10.9.5 on it. I know it is an old pc now, but it so far wrks, and am now on the lookout for a compatible monitor. I would like to keep it under $250.00 if possible, I do a little graphics, internet, and run a virtual machine windows through parallels desktop.