I have the above MBP and monitor, capable of 2560x1440. Although the Dell has a DisplayPort I've discovered it's a bit flakey*, much to my annoyance, so it looks like I'll have to get hold of the Dual Link DVI cable. On the Apple store, reviews seem to be 50/50 as to it's reliability - anyone care to contribute their experiences with it? I'm currently running it at 1920x1080 via bog standard DVI. Doesn't look great, inevitably, as it isn't native res. Besides, I want the 1440p. *I've a got a mdp-dp lead and, when it works, it's great. However, it sporadically doesn't resume the display from sleep and only a random combination of power cycling of the monitor makes it works. Impractical in the long term. I've discovered lots of others have experienced the same problem so it's not unique to my monitor, which I'm otherwise completely satisfied with.