Prevent (or solve) problems with your Apple ID!Your Apple ID is much more than a simple username. It's a key that unlocks a long list of Apple products and services on any of numerous devices. iCloud uses an Apple ID; so do iTunes, Apple Music, the App Store on Mac and iOS, the Books app, and more. An Apple ID protects your personal information, including email and iOS backups; helps you find a lost iPhone; and can even unlock your Mac. So it goes without saying that if something goes wrong with your Apple ID, you could be in for a world of hurt.Unfortunately, things go wrong with Apple IDs all the time. Fortunately, Glenn Fleishman, a veteran technology journalist and the author of Macworld's "e;Mac 911"e; column, is ready to help with expert advice on how to manage your Apple ID--including how to prevent, solve, or work around most common problems!In this book, Glenn answers questions like:What all is my Apple ID used for?How does my iCloud account relate to my Apple ID?What problems can two-factor authentication (2FA) solve, and how do I use it?Are there other mechanisms I can use to ensure that I can recover an Apple ID in the event of a problem? (Spoiler: yes!)What if I have a device that's too old to work with two-factor authentication?What should I do if I have two or more Apple IDs or iCloud accounts?Will I lose access to all my Apple media purchases if I move to another country?Can I share an Apple ID with someone else?What exactly should I do if I think someone is hacking my Apple ID account?How can I recover a forgotten Apple ID password?What steps should I take if Apple locks me out of my account?If I lose access to an email address associated with my Apple ID, what can I do?And that's just the beginning. Glenn has packed a remarkable amount of concise problem-solving information into this compact, 76-page book. Read it before you encounter Apple ID problems to minimize your risk, and if you've already encountered a problem, read it to find the best path to a rapid solution.