Desktop Wallpaper

General CMU Wallpaper 

1024 x 768 1280 x 800 1440 x 900	1024 x 768 1280 x 800 1440 x 900	1024 x 768 1280 x 800 1440 x 900
1024 x 768 1280 x 800 1440 x 900	1024 x 768 1280 x 800 1440 x 900	1024 x 768 1280 x 800 1440 x 900
1024 x 768 1280 x 800 1440 x 900	1024 x 768 1280 x 800 1440 x 900

PC download instructions:
Choose the image size that matches your screen resolution
When the picture loads, right click on the image
Select "Set as Background" or "Save as Wallpaper" from the shortcut menu

Mac download instructions:
Choose the image size that matches your screen resolution
Click and hold on the image, select "Save Image As" or similar from the shortcut menu
Under the Apple menu, go to Control Panels, Appearance
Select the Desktop tab, select the image you just saved