Where are the pictures for the screen savers stored?

The screensaver "files" are actually folders, just like applications, iWork documents, etc, and are often called packages. In the Finder, browse to:

/System/Library/Screen Savers

and ctrl-click on the Nature Patterns.slideSaver "file". Select Show Package Contents from the context menu. Browse to

Contents/Resources

to see the image files.

John

They are stored in "/System/Library/Screen Savers/".
You will find the photos in the package content "contents->Resources".

I am not sure if you can add photos to them and I didn't want to try it.
You could alternatively change the settings of the Screen Saver to iPhoto or iPhoto Selection containing your own selection.

(EDIT): ooops, there was another poster faster than me...

Try this Go to the Library folder and then scroll down to "User Pictures" There you should find Animals, flowers, fun, nature, and sports. Hope that helps

You can use pictures from anywhere on your hard drive. I think if you look at the bottom of the screen saver selection window, it says "Choose Folder". Create a folder and place the pictures in the folder you want to use. Navigate to the folder and select. And like MacOne said, you can use iPhoto. With iPhoto, it doesn't discriminate. It will display all the pictures in your library. If you want to use just certain pictures from your iPhoto library you can select just the ones you want to use and export them in the JPEG format, then place them in the folder you want to use. If you'll create the folder under your pictures folder it will get backed up with your data. Then select that folder with the screen saver option "Choose Folder" If you need any help with the export process, just ask.

Later & Luck

Do you by any chance know how to delete a folder that was put in the list using "Choose Folder?" I've tried the Delete key and dragging it to the trash to no avail.

Thanks for any help

You can change the folder on the "Choose folder list" by choosing another one.
Best.

Try this:

Close System Preferences.

Go into your home folder, and go to Library/Preferences/ByHost

In this folder you will find a .plist file(s) that starts with: com.apple.screensaver

Double click the file and look at the info that comes up, if it refers to the folder you want to get rid of, close the file and delete it...