1. Click the image size you'd like above.
2. When the image opens up in a separate window, place your mouse pointer over the image and click the RIGHT BUTTON. Then select "Set as Wallpaper" or "Set as Background".
3. It's as simple as that!

To download wallpaper to your Mac:

1. Download by clicking on the image size you'd like above.
2. After downloading, save the image somewhere on your hard drive.
3. From the "APPLE" menu, select "CONTROL PANELS/APPEARANCE".
4. When the "APPEARANCE" window opens, select the "DESKTOP" tab.
5. Click the "PLACE PICTURE" button. (If you already have a picture as a background, you will need to click the "REMOVE PICTURE" button first.)
6. Navigate to where you stored your downloaded image.
7. After selecting the image, click "SET DESKTOP".