How to Change the Login Screen Wallpaper on a Mac

How to Change the Login Screen Wallpaper on a Mac

Works for Various Versions of macOS:

If you want to change the Mac's login screen wallpaper, but not the wallpaper on the Desktop, perform this clever trick:

I. FIRST: Create the Background:

1. Open: an image you want to use as your new lock screen background
2. Click: [the file name] on top-left corner of image
3. Click: the “V” on the right-side of the file name
4. Type: lockscreen.png for “Name:”
5. Select: Desktop for “Where:”
6. Press: return key

Screenshot:

II. THEN: Open Desktop Pictures in Finder:

1. Click: the Desktop
2. Click: Go menu in the Dock
3. Click: Go to Folder…
4. Type: /Library/Caches/Desktop Pictures in “Go to Folder”
5. Press: return key

Screenshot:

III. FINALLY: Set lockscreen.png as the lockscreen wallpaper

1. Double-Click: each folder until lockscreen.png is found
2. Drag: lockscreen.png from the Desktop to Desktop Pictures folder
3. Click: Move button in the popup window (Screenshot A.)
4. Click: Replace button in the popup window (Screenshot B.)

(Screenshot A.)

(Screenshot B.)