Your Apple Watch can pair with and unlock your Mac.
Apple
You can unlock your Mac with a paired Apple Watch using a feature called "Auto Unlock."
To set up the feature, you need a compatible Apple Watch and Mac signed into the same iCloud account.
You can enable the feature in your Mac's Security & Privacy menu.
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You probably purchased your Apple Watch for its fitness trackers, or to easily use Apple Pay. But its features are growing year by year.
For example, you can use your Apple Watch to unlock your Mac. The "Auto Unlock" feature lets you pair an Apple Watch with a Mac that's signed into the same iCloud account, so you can unlock the Mac just by sitting down in front of it with the Watch on your wrist.
Here's how to make sure that you have the right gadgets to use Auto Unlock, and how to set it up.
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What you'll need to enable Auto Unlock
Before you can use Auto Unlock, you'll need to make sure that your Watch and Mac are compatible and up-to-date. Make sure that your devices meet these criteria:
Your Mac is running macOS Sierra or newer; or if you have an Apple Watch Series 3 or newer, macOS High Sierra or newer
They're signed into the same iCloud account
They both have a passcode set up
You'll also need to enable two-factor authentication on your iCloud account.
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Quick note: If your Watch is running watchOS 6 or newer, and your Mac has macOS Catalina or newer, you can also use the Apple Watch whenever you're prompted to enter your Mac's administrator password.
How to unlock your Mac with an Apple Watch
Once you know that you have two compatible devices, turning on Auto Unlock is a painless process.
1. Log into your Mac and open the System Preferences menu. You can do this by clicking the Apple logo in the top-left corner of your screen and selecting System Preferences. It may also be pinned to your dock (its icon looks like a gray gear).
2. Open Security & Privacy and click on the General tab at the top of the window.
3. With your iPhone unlocked and your Apple Watch on your wrist, check off the box labeled Use your Apple Watch to unlock apps and your Mac. When prompted, enter your Mac's password.
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You should now be able to unlock your Mac without entering its password, just by wearing your Apple Watch when you wake it.
Quick note: The first time you log in after you turn off, restart, or log out of your Mac, you'll still need to enter your password manually.
Christine Kopaczewski contributed to a previous version of this article.
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