I just bought a Phillips 245B monitor with QHD (2560x1440) so I could run it in native resolution with my MacBook Pro (15-inch, Mid 2010) and its NVIDIA GeForce GT 330M GPU.
Unfortunately with a Mini Display Port to Display Port adapter or cable the Mac does not recognize that there is a external monitor and the monitor just outputs "no video output".
With an Mini Display Port to HDMI adapter or cable the monitor works but with a maximum resolution of 1080p.
I tried already:
- Preferences -> Displays -> option-click on Scaled
- Resetting the PRAM
- Different Mini Display Port to HDMI adapters and a Mini Display Port to HDMI cable without adapter.
- A Mini Display Port to Display Port adapter and a Mini Display Port to Display Port cable, which resulted in the "no video output" on the monitor.
- Creating a new EDID file like here, which resulted in the monitor staying black.
What I did not try yet is an active Mini Display Port to HDMI adapter because no shop has one and also because I guess that if Mini Display Port to Display Port does not work there is a different problem.
I hope one of you guys can help me, I just do not know what else I can do...