In addition to creating pictures and storing them in a special folder, you can use your existing, or image library as a source of images for desktop wallpaper. Ever since OS X Leopard (OS X 10.5) the Mac has includes these libraries as pre-defined locations in the system’s Desktop & Screen Saver preferences pane.
Change Mac Screen Saver. Mac OS X El Capitan screen saver is somehow professional rather than Windows. Because on Mac you around six options “3D text, Blank, Bubbles, Mystify, Photos, Ribbons” but on Mac OS, you several options. Here are some of them. To add a folder from which to choose screen saver images on a Mac, access Desktop & Screen Saver settings under the System Preferences menu. After you select a screen saver style, you can pick a source folder with a few quick clicks. Your Mac comes with several screen savers that display photos, messages, artwork from your iTunes library or photo library, and more. From the Apple menu, choose System Preferences, then click Desktop & Screen Saver.
Although it’s easy to use these image libraries, it's a good idea to copying the pictures you intend to use as desktop wallpaper to a specific folder, independent of your Photos, iPhoto or Aperture library. 
That way you can edit images in any of the image libraries without worrying about affecting their desktop wallpaper counterparts. Tableau reader download for mac.
Change Mac Screen Saver • Floating • Flip-up • Reflections • Origami • Shifting Titles • Sliding Panels • Photo Mobile • Holiday Mobile • Photo Wall • Vintage Prints • Ken Burns • Classic • Flurry • Arabesque • Shell • Message • iTunes Artwork • Word of the Day • Random Note:Before, I start explaining each part so first, I want to tell you that you can set the screen saver to a limit of time. For example, you can manage after 1 minute that I don’t touch the computer then the screen saver should be displayed. I have told this option at the first because I don’t want to repeat this part again & again. Floating Screen Saver • National Geographic • Aerial • Cosmos • Nature Patterns • Custom Folder • National Geographic When you choose the national geographic folder, then all the national geographic photo or image that has been taken would be displayed on the Mac screen saver.
• Aerial Aerial Mac screen saver is like the national geographic style but it’s mostly nature pictures. When you select this option, all different kinds of nature picture you will on the screen saver of you Mac OS X El Capitan, Yosemite, Mavericks, Mountain Loin and so on.
• Cosmos Cosmos Mac screen saver is showing you all the NASA photos. All the pictures which displayed on the Mac OS X El Capitan screen saver are from the mountain, the moon, space, planetary or locomotive, and the stars. • Nature Patterns Nature pattern is a type of effect that displays on the Mac OS X El Capitan screen saver. When you choose this folder, then all the nature images. • Custom Folder If you don’t like these types of screen saver so don’t worry about it. Because you have another option as well.