OS X already comes with a sizable library of some of nature photography’s most beautiful pictures, curated personally by Steve Jobs for use as wallpapers. But as breathtaking as OS X’s default wallpapers can be, if you have your Mac desktop set to randomize, you’re probably sick to death of them at this point.
The foremost name in beautiful nature photography is here to help you supplement them. Every year, National Geographic holds a photo contest, and this year, they have put up all of their entries in downloadable JPEGs suitable for the desktop, iPhone or iPad.