How to boot linux from an external hard drive? I am looking into booting the latest Ubuntu distro (14.04) from an external hard drive using my Macbook Air mid 2012 running Mavericks. I've looked around and couldn't find a link to any step-by-step or instructional page to help me do this (or if its even possible).
That looks interesting but I am wondering why they tell you to boot from the 3rd party boot CD.

Once you have a bootable drive wouldn't just pressing OPTION at boot allow you to select the external Ubuntu USB drive? Or am I missing something here?