So where to find the instructions, I am all for it? You can directly visit XDA forum, one of the members there named, siedkins, has compiled the easy to follow step by step guide for you. He was a Windows user, but decided to switch to Mac, after being fed up with Bill Gate's OS and the need for all drivers. So he create the tutorial.
Before heading yourself to the instructions page here, make sure you have prepared the requirements, like: OS X, Android SDK and a USB cable. So what are you waiting for? Get there mate! Hurry!
Good luck bro!