OS X El capitan version 10.11.6 Macbook pro 13-inch

Whenever I connect to projector, the projected screen has a old picture of me and it is quite embarrassing when I am presenting in front of professional crowd. I already removed that picture from the Desktop pictures folder but every time I connect projector, it still shows the same.
This is not happening when I connect to external display (monitor) though.How can i change this?

2 Answers 2


I suggest you plug into a projector and then use the Desktop & Screen Saver Control Panel to change the background of the desktop being projected to something else. The new background should then stay the same anytime you plug a monitor/projector in.


As far as I'm aware, the desktop picture is stored separately for each desktop you use & can only be edited from System Prefs > Desktop & Screensaver whilst that desktop is in use.

The file that stores them all is at ~/Library/Preferences/com.apple.desktop.plist
If you edit that you could at least find where that picture is on your machine & either edit to another picture, or move the original so it can't be found.

It's not something I've ever tried editing & my own .plist isn't much help as I have the same picture across 2 monitors & 6 spaces... so there's a lot of repetition - so you might want to make a backup of it before messing.

  • I checked the preferences folder but could not find com.apple.desktop.plist file. I might just try to borrow a projector so I can edit this. thanks for the help :)
    – jkhadka
    Sep 19, 2016 at 9:24
  • Sure you checked the right folder? There definitely should be one there. ~/Lib... not /Lib... copy/paste my path into 'Go to Folder..' in Finder. Oops, sorry, just noticed a typo in my original path, missed a / Fixed.
    – Tetsujin
    Sep 19, 2016 at 11:54
  • Hey, yeah I checked the path you gave. found tons of preference files with com.apple.something but there was no com.apple.desktop.plist
    – jkhadka
    Sep 19, 2016 at 13:44
  • That's very odd... I know Spotlight won't find it but EasyFind (freeware) will, if set to search for invisibles. Might be worth a shot...
    – Tetsujin
    Sep 19, 2016 at 13:48

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