Retina Macbook Pro support help

Hello! I’ve spent the past 2 days trying to get a Cocos2d-x example to detect my retina MBP’s screen and display high-res graphics/sharp text. I have so far failed at this task. Does anyone have some advice? I’m a bit stumped. There are some other threads I’ve looked at that didn’t quite answer that I’m asking, but I may have missed something.

Thanks!