Maybe my favourite Continuity feature is Apple Watch Unlock for the Mac. Once you’ve set it up, then you’ll ever have to enter your password to unlock your Mac ever again — not until you restart it anyway. It’s one of the best examples of Apple’s It Just Works™ philosophy, and it will change the way you use your Mac.
Never unlock with your password again
If you have any Apple Watch, and any Mac built from 2013 onwards, then you can use this tip. Just head to the System Preferences, and click on the Security panel. Here, you’ll need to check one box: Use your Apple Watch to unlock apps and your Mac. It may already be checked, by default, if you recently got a new Mac.
Read more at CultOfMac.com