Change Your Aurora Login
Sunday, January 6th, 2008
If you want to change the default wallpaper of login screen in Leopard, just go to System/Library/CoreServices and replace DesktopDefault.jpg with your new one.
Remember to make a backup of the original and that you’re new file also needs to be called DefaultDesktop.jpg
Give Terminal a Change to Do
Applications » Utilities and type in the following:
cd /System/Library/CoreServices
sudo mv DefaultDesktop.jpg DefaultDesktop_org.jpg
sudo cp /Path/to/picture/you/want/to/use/image.jpg DefaultDesktop.jpg
Above procedure will come with the same result.