CompTIA A+ exam 220-1102 includes several objectives that deal with macOS and Linux, and this lesson prepares you for that by explaining the macOS desktop and how to use it to manage files, install and run apps, and access popular utilities such as Keychain and Boot Camp. You'll learn how to customize the desktop and protect your disks, files, and accounts. We'll round out this lesson by explaining the basics of the Linux OS, including distros, the (optional) desktop GUI, file systems, startup apps, and software updates.