The course starts off with the basics-learn to set your system preferences and user accounts, organize the desktop, work with the launchpad, and set up the computer so that it works best for you. Mac OS High Sierra Essential Training: Learn the ins and outs of High Sierra, the latest Mac operating system. Explore th e changes in Photos, iCloud, Safari, Mail, Notes, and more. Mac OS High Sierra New Features: Learn about the cool new features in High Sierra, including the apps that come bundled with the operating system. MPT recommends you start there with the following: Apple's website and are both excellent sources of information about OS X.