Tired of the default Leopard’s 3D dock background image?
To install a custom backgrounds for your dock:

  1. Just go into System/Library/CoreServices/ right-click on Dock and select “show package contents”. 
  2. Once here go into Contents and then resources. Copy the image files here, but be sure to back up the original files if you want to revert back to the default leopard appearance.
  3. Once the images are in place, go into terminal and type killall dock - this will close the dock and restart it. 
  4. When it comes back up your new background should be in place.

Download some backgrounds here and even more here.

Posted in Leopard, Mac OS X, Macintosh Tips & Help