I have a Macbook Air (with OS X 10.10 Yosemite). I've set the wallpaper to a folder and let the wallpaper change randomly every 30min. When I work at my desk, I have an additional external Display, and what I want is that that screen has the same wallpaper like the main display.
Is there a way to do this or do I miss an option?
Best Answer
From the Preference pane I do not think you can do it.
But I just wrote an applescript that works on both my displays.
---------- UPDATE:
I was having a problem with the LaunchAgent loading on login.
Thislooks like it was because the system was trying to compile it and failing.
So I have updated the Answer to fix this by using a compiled Applescript instead of a plain text.
Each desktop changes to the same image. If I switch to a new space on a desktop it's image will change when the time comes.
There are couple of ways to run the script.
But in my opinion using LaunchAgents is the best way.
This answer may look complicated but should only take a minute to set up and start using.
1, Create paste this script into a new Script Editor document.
2, change the path in the line
to contain your pictures folder if it is not the standard one. Make sure what ever folder you use only has images in and no other type of file or folder.
3, Save the document file format as a Script file (scpt)
4, In Terminal.app type:
chmod +x will make the file executable. Chang the path to the path of your script file.
5, In TextEdit.app
Open a new Plain text document and paste:
Change the line:
to contain the real path to your script file.
Change the line:
to contain the number of seconds you want the interval between runs.
6, save the file with the extension .plist in your users LaunchAgent folder.
7, Now in terminal type and run:
Replace foo.plist with you real plist file name.
This will load the launchAgent to the system and start it running.
Or you can log out and back in.
To unload the launchAgent