One of the new features in OS X 10.5 is the ability to display a Mosaic screen saver from a group of pictures. The mosaic feature can be difficult to find. Here is how to enable it.
When I first tell people about the cool new Mosaic screen saver, they often have problems finding it. It’s listed as a Display Option instead of being in the Screen Saver list.
1. Open System Preferences
2. Select Desktop & Screen Saver
3. Select the Screen Saver tab
4. Select one of your images folders in the left hand column
5. Select Mosaic as a Display Option as documented in the screenie below…