Change Login Background in Lion

Yesterday, I showed how you could change the background of the Dashboard, Mission Control, and the folders in Launchpad. There's one more default background that you could change, the one behind the login window. Changing it is as easy as changing the other backgrounds. Just create a copy of the original file, and replace it with your own PNG image.

You'll want to navigate to the folder location below. Just copy the path, go into Finder, and press Command + Shift + G, and paste that path in.
/System/Library/Frameworks/AppKit.framework/Versions/C/Resources

The file you'll be replacing is called NSTexturedFullScreenBackgroundColor.png

You may have to play around until you find a background you like. A few things to remember:

• It must be a PNG image


• 72PPI resolution (most images will fit this requirement)


• And create a backup of the original!

Again, if you're not comfortable changing system files, this isn't for you. Honestly, it's not too hard, and as long as you make backups of the originals, it's safe to do. So if you don't like Apple's backgrounds, why not make a few of your own?

via AskDaveTaylor