Mac OS X Shortcuts Keyboard Cover for MacBook Air 11"" Model #: OSX-M11-CC-2. Use OS X faster and easier to make your Mac perform better! This ultra-thin form-fitting keyboard cover is loaded with the most common keyboard shortcuts - for Safari Mail Finder Primary and more - color-coded right on the keys! So you spend more time using your Mac and less time learning and memorizing program shortcut keys! OS X Shortcuts keyboard covers are compatible with OS X and earlier.