There are three webpages with instructions on how to install Ubuntu on a Macbook Air 5,2 model: https://help.ubuntu.com/community/MacBookAir5-2/Trusty http://maketecheasier.com/install-dual-boot-ubuntu-in-macbook-air/2012/08/27 http://ubuntuforums.org/showthread.php?t=2039799