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Wednesday, October 21, 2009

Change the background image of Login Window

There are ways to change the background image by replacing the Aqua Blue image, but that is slightly crude. A better way to do it is using the Terminal. Type the following command and press return:

sudo defaults write /Library/Preferences/com.apple.loginwindow DesktopPicture /Users/Shared/mynewbackground.jpg


The last part, /Users/Shared/mynewbackground.jpg is the location of the image you want to use. You don't have to type it out. Just paste the command as far as DesktopPicture and put a space after it. Then find your image in the Finder, and drag it onto the Terminal window. The address to your image should just appear. As far as I can tell, you have to place the image in a place that all users have access to (the shared folder is a good place).

To change back to the normal Aqua Blue image, type the following command and press return:

sudo defaults write /Library/Preferences/com.apple.loginwindow DesktopPicture /Library/Desktop\ Pictures/Aqua\ Blue.jpg

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