Mac Security Features
The Apple Watch can already unlock your Mac without you needing to type in a password or authenticate with Touch ID. But in macOS Catalina, the Apple Watch can be used for a lot more than just unlocking your computer.
As long as your Watch is running watchOS 6 or later, you can quickly unlock password panes or secure notes with your wearable. You can also approve app installations via Gate Keeper and other security-related functions right from your wrist.