If you're confronted with a blank or black desktop background, it's possible that the original wallpaper image has been moved or deleted. Right-click (or tap and hold) on a blank area of the ...

User Configuration > Administrative Templates > Desktop > Desktop On your right-hand side, you will find a setting called Desktop Wallpaper. Double-click on it and select the Enabled option.

It’s easy to change the wallpaper on a Mac: just right-click the desktop and select Change Desktop Background, or open System Preferences and select the Desktop & Screen Saver option.