With Sierra, Apple brings never-before-seen features to macOSlike Siri voice control, file sharing across all your iOS devices, picture-in-picture mode for iTunes and Safari, and AI photo search. Once again, David Pogue brings his humor and expertise to the #1 bestselling Mac book.Whether youre a developer or a home-user, this guide offers a wealth of detail on Apples OS X 10.12 operating system, this new edition covers everything Sierra has to offer.Perfect for newcomers. Get crystal-clear, jargon-free introduction to the Dock, the macOS folder structure, Safari, Mail, and iCloud.Go in-depth. Learn how to use key new features such as Optimized Storage, the Universal Clipboard, Siri for Mac, and iCloud Drive Sync.Get the full story. David Pogue doesn't stop at telling you how to use macOS features. He wants you to know why to use themand how to avoid common pitfalls.