sign in with Apple ID
Sign in with your Apple ID on your Mac to access Apple services such as the iTunes Store, the App Store, Apple Books, and iCloud. You can view and change your Apple ID information, including your name, photo, contact information, password and 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.
To sign in on your Mac, choose Apple menu > System Preferences, click Sign In, then enter your Apple ID and password. For information about signing in on your other devices, see the Apple Support article Sign in with your Apple ID.