Your Apple Watch isn't only
useful for tracking your fitness or using Apple Pay: If you have a compatible Mac, you can also use Auto Unlock: The feature (which requires macOS Sierra or later and watchOS 3 or later) lets you pair your watch to your Mac; once you've done so, you can automatically unlock your
computer just by sitting down in front of it, no password required — if your Apple Watch is unlocked and on your
wrist when you sit down.