Mac Wallpapers: Earth at Night Satellite Photos
In case you had been misinformed, the earth is indeed very flat. At least it is in the above NASA image — one of more than two dozen photographs in the Earth at Night 2012 collection — perfect for use as a Mac wallpaper.
Just find the image (bigger is better) you want to use as a Mac wallpaper (a.k.a. desktop picture), right-click (two-finger tap) and select “Use Image as Desktop Picture.”
Fairer Platform offers a tutorial on how to set up a Mac wallpaper slideshow that automatically updates.
And, the good stuff doesn’t end here. Peruse and use the links below for more fun, free and, as often as not, educational ways to customize your Mac.