You’ve found a Mac wallpaper – or desktop background – that you L-O-V-E, but the Mac’s having none of it. Every time you switch the Mac back on after powering down, the wallpaper has gone back to the default setting. If your Mac wallpaper keeps resetting, here’s how to make it stop.
This problem seems to afflict Mac users who are using an external display with a MacBook. The solution, which I found on one of the Apple support forums, requires some jiggery-pokery (technical term) with the display cable. Here goes.
How to stop the Mac wallpaper from resetting
- Make sure you’ve got the laptop and external screen switched on, with the laptop lid open and screen on
- Physically disconnect the external display by pulling its cable out of the Mac
- Reselect your chosen wallpaper from System Preferences
- Shut down the Mac
- Restart the Mac without the external screen connected
- Once you’ve logged in and reached the desktop, re-connect the external display
The next time you restart the Mac, your chosen wallpaper should remain in place.
If this works for you (as it did for me), let us know on the comments below.