Mac Retina Support Enable this option to enable support for high DPI (Retina) screens on a Mac. Unity enables this by default. This enhances Projects on a Retina display, but it is somewhat resource-intensive when active. I assumed disabling retina support would run the game in half retina resolution (less resource intensive). I don't see a change at all in my game, but maybe it only affects things like font rendering? the documentation tells me pretty much nothing about what changes this is supposed to produce and I've wasted too much time on this.