Preparation:
First I will assume you have the Mac operating system installed on your computer since your using a Macbook pro. Also you will be partitioning your computer into three operating systems and will need to split the partitions evenly unless you want to change the numbers around yourself to get more space on any one operating system you can. But I am basing this around splitting your hard drive into three parts evenly.
Before we start, a word of warning: you MUST plan all your partitions in advance (ie. how much space each OS has and how many of them you have) because if you dont, you WILL NOT be able to change them after the process has been completed unless you do a complete reinstall from scratch.
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I tend not to brag, but in the interest of bragging for bragging sake.. I only use one OS. Security Enhanced Linux – as endorsed by the NSA (theres an old saying “whats good for the goose..”).