Yosemite 10.10
In this series I cover some of the basics of the OS X operating system including Apple Software related to it. I cover everything from installation and set up to various functions of the OS itself.
OS X Yosemite Part 1: Upgrade Step by Step


OS X Yosemite Part 2: Hand Off on All Your Macs


OS X Yosemite Part 3: Creating a Bootable USB Installer


OS X Yosemite Part 4: Clean Install Walk Through