Hey guys, I have a 2012 rMBP with the Yosemite beta installed. When I hooked it up to my Dell U2414H, my macbook just won't recognize it any longer. I checked every port (DP, DP, mini DP, HDMI, HDMI) and tried different cables. Does anybody have similar problems? It worked with Mavericks and Windows before. I can't test it with Windows because I deleted that partition. Thank you. Google was of no help for me.