Unlock your Mac with your Apple Watch - Apple Support

While you’re wearing Apple Watch, your Mac can sense when you’re nearby and automatically log you in. You can also use Apple Watch to approve other requests for your administrator password. 

Unable to Auto Unlock Mac with Apple Watch? Troubleshoot & Fix

Restart Apple Watch - Apple Support (IN)

How to unlock your iPhone with your Apple Watch — Apple Support

How to contact Apple support: All methods, explained

How to Unlock Your iPhone and Mac With an Apple Watch

Add your car key to Apple Wallet on your iPhone or Apple Watch

Unlock your Mac with Apple Watch - Apple Support

Auto Unlock not Supported by Apple Watch Series 3 on Sierra – 512

How to Unlock Mac with Apple Watch