Secure your devices with Touch ID
Use Touch ID (on supported models) to securely and conveniently unlock iPhone or iPad, authorise purchases and payments, and sign in to many third-party apps by pressing the Home button with your finger or thumb.
To use Touch ID, you must first set up a passcode on your iPhone or iPad.
Find out how: To view a task below, select the plus button 
next to its title.
Set up Touch ID on your iPhone or iPad
If you didn’t turn on fingerprint recognition when you first set up your iPhone or iPad, go to Settings
> Touch ID & Passcode.Turn on any of the options, then follow the on-screen instructions.
If you see existing fingerprints you don’t recall adding, see Delete unknown fingerprints from iPhone or iPad.
Note: If you can’t add a fingerprint or unlock your iPhone or iPad using Touch ID, see the Apple Support article If Touch ID isn't working on your iPhone or iPad.
Set up Touch ID on your Mac or Magic Keyboard
To use Touch ID, you must first set up a password on your Mac.
Do one of the following:
On your Mac using macOS 13 or later: Choose Apple menu
> System Settings, then click Touch ID 
.On your Mac using macOS 12 or earlier: Choose Apple menu
> System Preferences, then click Touch ID .
Click “Add Fingerprint”, enter your password, then follow the on-screen instructions.
If your Mac or Magic Keyboard has Touch ID, the sensor is located at the top right of your keyboard. You can add up to three fingerprints to your user account (and you can save up to five fingerprints total on your Mac).
Click the tick boxes to select how you want to use Touch ID:
Unlocking your Mac: Use Touch ID to unlock this Mac when you wake it from sleep.
Apple Pay: Use Touch ID to complete purchases you make on this Mac using Apple Pay.
iTunes Store, App Store & Apple Books: Use Touch ID to complete purchases you make on this Mac from the Apple online stores.
Password AutoFill: Use Touch ID to automatically fill in usernames and passwords and to automatically fill in credit card information when requested while using Safari and other apps.
Use Touch ID sensor for fast user switching: Use Touch ID to switch Mac user accounts.