sign in with your Apple ID
Sign in with your Apple ID on your Mac to access Apple services such as the App Store, Apple Music, iCloud, FaceTime, Apple Books, and more.
You can sign in when you set up your Mac, or choose > System Preferences, click Sign In, then enter your Apple ID and password. If you don’t have an Apple ID, you can create one.
You can view and change your Apple ID information, including your name, photo, contact information, password, security settings, and payment and shipping information. When you sign in with the same Apple ID on all your devices, your information and content are available on all those devices.
Your information and content are available on all your devices when you’re signed in with your Apple ID. See the Apple Support article Sign in with your Apple ID.