Change Touch ID preferences on Mac
If your Mac has Touch ID, use Touch ID preferences to enable your Mac to be unlocked with your fingerprint, and to add one or more fingerprints to your user account. You can also enable Touch ID to be used to make purchases with Apple Pay and from the iTunes Store, App Store, or Apple Books.
To open this pane on your Mac, choose Apple menu 
> System Preferences, then click Touch ID.
Open Touch ID preferences for me
Add a fingerprint | Click to 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). |
Unlocking your Mac | Select to enable your Mac to be unlocked with any fingerprint added to the current user account. |
Apple Pay | Select to enable the current user to approve Apple Pay purchases using Touch ID. |
iTunes & App Store | Select to enable iTunes Store, App Store, and Apple Books purchases with Touch ID. |
Safari AutoFill | Select to automatically fill in user names and passwords and to automatically fill in credit card information with Touch ID in Safari. |
