Touch ID & Password settings on Mac
On your Mac, use Touch ID & Password settings to change your login password, and—if your Mac or Magic Keyboard has Touch ID—add a fingerprint.
Browse through the options below for details about customizing your settings.
To open these settings, choose Apple menu > System Settings, then click Touch ID & Password in the sidebar. (You may need to scroll down.)
A login password has been set for this user
Change the login password and password hint for the current user.
Add a fingerprint to the current user account. To rename a fingerprint, click the text below the fingerprint, then enter a new name.
You can add up to three fingerprints per user account (your Mac can store up to five fingerprints total).
Use Touch ID to unlock your Mac
Allow Touch ID to unlock your Mac with any fingerprint added to the current user account.
For security, you need to enter your password when you start up your Mac.
Use Touch ID for Apple Pay
Allow Touch ID to approve Apple Pay purchases.
Use Touch ID for purchases in iTunes Store, App Store, and Apple Books
Allow Touch ID to make purchases.
Use Touch ID for autofilling passwords
Allow Touch ID to fill in user names, passwords, and credit card information in Safari and other apps.
Use Touch ID for fast user switching
Allow Touch ID to switch between Mac user accounts.
To switch accounts using the menu bar or Control Center, see Switch quickly between users.
Use Apple Watch to unlock your apps and your Mac
Allow your Apple Watch to unlock apps when they require a password and unlock your Mac when you wake it from an idle state. See Unlock your Mac and approve requests with Apple Watch.
This option is available only if your Mac supports Auto Unlock.