This tutorial will walk you through the complete process of installing new RAM in your MacBook Pro. From deciding which RAM to purchase to how to tell if the installation worked, we've got you covered. What is RAM? Random access memory, or RAM is one of the cheapest and easiest ways to upgrade your MacBook, and it can also be one of the most effective. Upgrading your RAM will not necessarily make your apps run faster, but what it does is increase the capacity for having app