I just bought Dell U2715H display for my Mac Mini -- based on many reviews that said this is a great display for Macs. Including a review on the Amazon page for this display. But when I connected it, it keeps blacking out and switching resolutions. It works for about five seconds, then goes black, comes back at a higher resolution for a second, goes black, then comes back at the original resolution. I can't find any settings that solve the problem. It's connected with the mini-Display Port in the Mini's TB port, to the full DisplayPort plug into the Display? And, when I went to Dell's support site for this display, the listed operating systems are all Windows! Do I just need to return this because it doesn't work on Mac OS? That would surprise me, given that reviews I've seen claiming this works great with Macs. And the display's page on Amazon does not say it's incompatible with Mac or other list the necessary operating systems. I called Dell, and they said that the display should work fine, without any additional drivers. But they couldn't give me any other advice because I'm at work, and the monitor is at home. Any thoughts?