If you’ve been enjoying Mountain Lion’s beautiful new Screensaver images, like National Geographic, Aerial and Cosmos, you might like to have some of those images as wallpapers for your Desktops in Mission Control.
First, from a Finder window, navigate all the way to here:
[Macintosh HD] > System > Library > Frameworks > Screensaver.framework > Versions > A > Resources > Default Collections
Select the four folders inside and then press ‘command’ and ‘c’ on the keyboard. Navigate to your Pictures folder from any Finder window’s sidebar and press ‘command’ and ‘v’ to copy the folders and images.
You can now add them to your collection of available Desktop pictures by clicking the Desktop tab in
> System Preferences… > Desktop & Screensaver
and clicking the plus ‘+’ button in the box underneath the list of folders on the left. From the window that pops up, choose ‘Pictures > National Geographic-1’and hit ‘Choose’.
Repeat for any of the others (Aerial, Cosmos, Nature Patterns) that you want to add. 🙂