How to Fix Your Mac's Gray Desktop Background Image Issue

Zach Zach (249)
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.

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Navigate to Applications > Utilities > Terminal.

killall Dock

This command will restore your background image.

Change your Mac's appearance to light, dark, or auto.
1 minute

One of the great features of macOS Yosemite and later is Mac user's ability to change the default Light appearance of Macs to Dark Mode.