Change the Desktop Wallpaper Automatically in Mac OS X
Can’t decide which wallpaper to use as your desktop background? Me neither. Fortunately there’s a setting in Mac OS X that causes the desktop picture to change itself automatically at a user selected time interval, ranging from every 5 seconds to once a day or upon system wake.
Essentially this means your wallpaper will change itself on a set schedule, so you’ll never be stuck with the same image. You can use this to rotate through wallpaper pictures, or if you get creative, to make some pretty interesting desktop background effects, like changing colors, or going from a black and white picture to a colorized version, and so forth.