How to Replace the Deault Login Background Image on Mac OS X Leopard

Replace your Default Desktop Background

The default nebula login background picture is great, but you're not stuck with it or any one picture as your login background. You can replace the default background with any jpg image file on your Mac. Learn how to replace the default login background image on Mac OS X Leopard.

Instructions

1. 

   In an open Finder window, navigate to the "/System/Library/CoreServices/" folder on your Mac. Locate the file "DefaultDesktop.jpg." If you want to make a backup copy of the standard Apple Default Desktop image file, double-click the file to open it in the Preview application. Chose "Save As" from the file menu and save the file to your Desktop or Pictures folder.

2. 

   Locate the new jpg image file you wish to use as your new login picture and rename the file "DefaultDesktop.jpg" (without the quotes).

3. 

   Drag and Drop your newly renamed "DefaultDesktop.jpg" to the "/System/Library/CoreServices/" folder on your Mac and release your mouse to copy the file to the folder/directory.

4. 

   Next, you will see a warning dialogue box asking if you want to overwrite the old "DefaultDesktop.jpg," click "Replace." You will need to enter your administrator user name and password in the next dialogue box to copy the new image file to the "/System/Library/CoreServices/" directory. Enter your name/password and click "OK" to copy over the existing file. To view the new Default Login Background, restart or log-out and login again to see the changes.