I am trying to hook up my Dell u3011 to my retina MacBook Pro using a mini DisplayPort to DisplayPort connector, and finding myself a bit perplexed as to why it doesn't work. Basically the top resolution that Mac OS X allows on the external display is either 1080p or 1280x1024(scaled!), while monitor's native resolution is 2560x1600. I Googled around and people recommend using SwitchResX tool, to fix the issue, but I am curious if there is a way to force the correct resolution with native tools(cli or some obscure settings?).
Note: I am using OS X Mountain Lion. The miniDisplayPort to DisplayPort connector is from Monoprice.