I cannot get my out of the box new Dell u2415 to work with my MacBook Pro (MBP). I have a MacBook Pro (15-inch, Early 2011). After working with Dell Tech Support, they tell me it is "Plug-n-Play" and incompatible with Apple. However, I find on YouTube and here, people using this new Dell monitor. I told Dell, I cannot get any Menu or what have you, to come up on the Dell. Only the "Inputs" selection. Frankly, after two nights and four hours or so (also with Apple). I'm about to give up. Ideas???