Is anyone having issues connecting their 2015 Macbook Air to a monitor via mini-DP to DP cable ? The MBA detects the monitor when connected through the DisplayPort cable. However the monitor is blank and no signal is detected. I am using a Dell U2713HM monitor via the DisplayPort. This same monitor and cable works for my 2010 MBP and 2012 Mac mini. The monitor works if I use a mini DP to DVI cable but I can't reach maximum resolution using DVI.