
When you sign in with your Apple ID user name and password for the first time on a new device or the web, you'll receive a notification on your trusted devices that someone is trying to sign in with your Apple ID. If you do, your account is less secure and you can't use features that require a higher level of security. If you updated to two-factor authentication inadvertently, you can turn it off within two weeks of enrollment. If you're already using two-factor authentication with your Apple ID, you can't turn it off. Then tap Upgrade Account Security and follow the onscreen instructions. Tap Continue when you see a prompt to upgrade account security. Answer your security questions, then tap Continue.

On your Mac: Choose Apple menu > System Settings (or System Preferences), then click your name (or Apple ID).

Then tap Continue and follow the onscreen instructions.

Certain Apple services and features, such as Apple Pay and Sign in with Apple, require two-factor authentication. Two-factor authentication is the default security method for most Apple IDs. Because just knowing your password isn't enough to access your account, two-factor authentication dramatically improves the security of your Apple ID and the data that you store with Apple. When you sign in with your Apple ID for the first time on a new device or on the web, you need both your password and the six-digit verification code that's automatically displayed on your trusted devices. Two-factor authentication is an extra layer of security for your Apple ID, designed to make sure that you're the only one who can access your account-even if someone else knows your password.
