Ridiculously Simple Guide to MacBook, iMac, and Mac Mini

Every September, Apple holds a press conference to get us excited about the newest gadgets that are certain to suck your wallets dry. And every September, almost as an afterthought, something else is mentioned--something that is actually free! 

The latest version of Mac OS. 

You, of course, need to own a Mac computer (such as MacBook, Mac Mini or iMac) to get it, but Apple keeps updates absolutely f...