I just posted a similar problem for my new MBP 2012, https://discussions.apple.com/message/19002889?ac_cid=op123456#19002889
But I guess this problem started even since MBP 2011, so how do I use my MBP for the basic functions of digital photography editing when I can't even calibrate my attached monitors?!
A Google search took me to this discussion at a Dell forum. Unfortunately, no solutions. It seems as if the only solution at this point is to buy an Apple Thunderbolt Display. Not the solution that you guys are looking for, I know, but if you read the discussion it's stated specifically that Dell does not test it's monitors with Apple equipment.
Thanks for the link to the Dell discussion forum.
Reading that thread and half a dozen others on the Apple forum is really a sad day for me, having owned every single iphone, ipad, Mac mini, MacBook Pro that Apple has put out, the latest Retina MBP has completely disappointed me. It seems neither Dell nor Apple care about the users who need the correct color space for digital photography.
I bought the latest and greatest MacBook Pro this year and it doesn't connect to an external monitor in the correct color space for me to do digital photography? This is really a sad situation. Will be returning it as soon as I migrate the data out.
I would gladly buy an Apple Thunderbolt display, but just can't stand its glare, not to mention it's limited resolution @2560x1200 which is smaller than the 30" @2560x1600.
Bumping this because I am having a similar issue and posted here about it: https://discussions.apple.com/thread/4286200?start=0&tstart=0
As I mentioned in that thread, there may be a way to fix this by editing a .kext or .plist file, but I have no idea what I'm doing when it comes to that stuff.
I have a U3011, and my MBP retina 15inch
(10.8.2) only sends YPbPr space to the display via miniDP to DP cable instead of RGB. If I change the settings to RGB, the color is all funny looking. For all professional purposes this is useless. Nobody from Apple or Dell is willing fix this.
U3011 only uses HDMI 1.3, so you won't get the full resolution. I also have used a mini-DP to dual-DVI adaptor. It gets RGB from MBP, the text is all garbled for anything above 1600x1000 .
I am at my wits end.
Folks - the answer seems to be on the page linked below. It requires a bit of Terminal-Fu but isn't desperate...