Knowledge for the World

How to restore your Mac's desktop background image when it's stuck as a grey screen

  • by Zach (134)
  • 2 minutes

I hooked up my external monitor today and found that its desktop background had been replacement by a grey image. I tried going into System Preferences and setting the background image again but it remained grey. Here's how to fix the problem when it occurs.


Navigation to Applications > Utilities > Terminal.


killall Dock This command will restore your background image.