I have been searching all day for an answer on the forms and can't seem to find the right answer. I have an Gigabyte 650 Ti Boost. When using it with an Apple Cinema Display , there is no output. When using it with HDMi on my tv, there is output and works just fine.
Version - 10.8.4
Nvidia drives are installed
Previous GPU - HD 6780
Apple Cinema Display is MDP
So I have replaced the adapter with a new one and it is not that