Now in your case in particular it looks like you already have the UUID folder and don't need to create anything, and you already have a lockscreen.png file inside the UUID folder. The lockscreen.png file (it's the file for the login screen wallpaper - the one you see when restarting/turning on - aka the ugly colourful Big Sur we're customising) inside the UUID-named folder will automatically be re-created/modified by your computer every time you change your desktop wallpaper, so that the login background and the desktop wallpaper will match. Grant permissions to Read&Write for this new folder. Inside Desktop Pictures create a new folder and name it with your UUID. Go to Library > Caches > Desktop Pictures. Ok so by default just follow the original instructions to the letter. Right now that "lock screen.png" matches my login background, not the colorful Big Sur restart wall paper.? Tested on a 2018 MBP and works perfectly.Ĭan we see a screen shot of your modified folder as you indicate: /Library/Caches/Desktop Picturesįor clarity are you saying create another sub folder with a tile of the UUID?ĭo you place another picture in that folder, do you name with UUID number or do you name it "lock screen.png" ?ĭo you delete the old "lock screen.png" ? Restart computer.īig Sur will now always create a lockscreen.png file in the UUID folder matching the current wallpaper. Make sure FileVault and Guest user are deactivated.
Grant permission to Read & Write to user, admin, everyone. Inside Desktop Pictures create folder with UUID value as name. If it doesn't exist create Desktop Pictures folder. Right click on user in left column > Advanced Options. Just sharing a solution I've found on Stack Exchange.
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