Review length list of all the new features and enhancements Apple piled into OS X 10.11 El Capitan, and definitely aimed at newcomers to the platform. Example:
OS X is the operating system that powers every Mac. Built on a rock-solid UNIX foundation, it’s engineered to take full advantage of what the hardware is capable of. It’s designed to be as easy to use as it is beautiful to look at. It comes with an amazing collection of apps you’ll use — and love — every day. And it enables your Mac and iOS devices to work wonderfully together.
Mac users number about 75-million worldwide. iPhone and iPad users number about 750-million worldwide. Newcomers to the Mac are already familiar with Apple.