Sign in to your Apple Account
Sign in to your Apple Account 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 after you have set up your Mac, you can go to System Settings, click “Sign in to your Apple Account” at the top of the sidebar, then enter your Apple Account and password. If you don’t have an Apple Account, you can create one.
You can view and change your Apple Account information, including your name, photo, contact information, password, security settings, and payment and shipping information. When you sign in to the same Apple Account 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 to your Apple Account. See the Apple Support article Sign in to your Apple Account.