I downloaded CNX-D mainly for the D750 raw support. I was also hoping that it would improve on CNX-2's sluggish performance and less than optimal usability on the Mac but unfortunately this was not the case. I run a nearly brand new MacBook Pro (retina display, 2.3 GHz core i7, 16GB RAM) with multiple external displays. The performance should be blazingly fast; however, CNX-D is sluggish and moving the app around the displays is a drag, no pun intended. I love Nikon cameras but I wish they stopped making their own imaging software and would just support 3rd party developers. I mean, how long do I have to wait until DxO Optics Pro 9 will support D750 raw files?