Download Instructions for CITW Desktop Background/Wallpaper PC users: Click here or on image above to view in browser. Right-click on image and scroll down to Set as Background. Choose "Position + Stretch" and affirm by selecting "Set Desktop Background"—no downloading required. MacOS X users: Click here or on image above to view in browser. Right-click or press "Apple + spacebar" to "Save Image on Desktop." Open System Preferences + Desktop & Screensavers + Desktop . Select image in viewer + Stretch to fill screen.