Aug 12, '13 07:30:00AM • Contributed by: LexFriedman
To find the images, use the Go To Folder command in the Finder (from the Go menu) and navigate here:
/System/Library/Frameworks/ScreenSaver.Framework/Versions/A/Resources/Default Collections/
There, you'll find four folders full of high-resolution imagery. You can copy them elsewhere, or even access the images from right where they are. Simply fire up the Desktop & Screen Saver preference pane, click the Plus (+) icon at the left, and add the folders—or individual images—as desired.
