Change the login window background in Mac OS X

Here are the instructions how to change the
background image of your Mac OS X login window.
? Step 1: Locate the file “Aqua Blue.jpg,” which is in
/Library/Desktop Pictures/. Rename it so you don’t overwrite it later.
? Step 2: Create a new image or re-purpose an existing image that
inspires you. Name the new image “Aqua Blue.jpg” and place it in the
/Library/Desktop Pictures/ directory.
? Step 3: There is no step 3.

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