help on getting the right version of pro tools

hello my name is itamar.



i've been searching through and through and just this moment have lost my nerve.

i am new to this pro tools business and can't seem to find my arms and legs on this one.



i have a Macbook Pro 2014 retina running latest version of Mavericks. i have a Universal audio Apollo Twin duo interface through thunderbolt. i wanna know which versions of pro tools will work on my system. i mean all pro tools versions that can flawlessly run on my system and what exactly are the differences between them.



Thanks in advance. itamar.