macOS Sierra: How to Unlock Your Mac With Your Apple Watch

macOS Sierra makes it easier for Apple Watch owners to unlock their Macs with a new "Auto Unlock" feature that lets the Apple Watch be used for authentication purposes instead of a traditional password.

It's a feature that's limited to more recent Macs so it's not going to work on every machine that can run Sierra, but when it is available, Auto Unlock is a super useful feature that genuinely saves a bit of time. It isn't enabled by default, so there are a few steps to go through to turn Auto Unlock on. Here's how to use it.

  1. Navigate to the Apple logo on the upper left hand of the screen and select "System Preferences."

  2. Click on "Security & Privacy" from the first row of apps.

  3. Auto Unlock is an option under the "General" section. Click the check box to turn it on.

    autounlocksierra

  4. Enter your password.

    enteryourpassword

Once enabled, Auto Unlock works automatically whenever your authenticated Apple Watch is near your Mac (as in within a few feet). When waking a Mac from sleep and the password entry screen pops up, it will say "Unlocking with Apple Watch..." instead of bringing up the password text box.

loginscreenautounlock
A few seconds later, the Mac will unlock and you will receive a notification on your Apple Watch letting you know the unlocking was successful. If Auto Unlock fails to authenticate for some reason, the password entry option will pop up after approximately 10 seconds and you will be required to enter your password to log in.

applewatchautounlockmac
Auto Unlock is a Continuity feature, so it is limited to some of Apple's more recent machines. It is supported by all Mac models introduced in mid-2013 or later, and it requires an Apple Watch running watchOS 3 paired with an iPhone 5 or later. Handoff must be turned on in System Preferences (General --> Allow Handoff) and your iPhone, Apple Watch, and Mac must be signed into the same iCloud account.

sierraunlockallowhandoff
To enable Auto Unlock, you will also need to turn on Two-Factor Authentication if it isn't on already.

For those of you using the original Two-Step Verification instead of the Two-Factor Authentication feature introduced with iOS 10, you will need to disable Two-Step Verification on the Apple ID management site and then enable Two-Factor Authentication on an iOS device. A passcode also needs to be established on the Apple Watch.

autounlock2farequired
Apple doesn't offer troubleshooting tips if Auto Unlock isn't working, but signing out of iCloud and back in again and restarting your devices may help solve any issues.

There are still instances where you will need to log in with a password, like after rebooting your machine, but for the most part, Auto Unlock successfully replaces password entry on the Mac.

Related Roundup: macOS Sierra


Top Rated Comments

(View all)
Avatar
8 months ago

Same here. I can't think of any technical reason that this wouldn't work. I'd be shocked if it doesn't work on a 2012 rMBP. Oh wait, this is Apple. Wouldn't shock me in the slightest.


Because it uses time-of-flight WiFi, it requires a Mac with a 802.11ac card.
Rating: 7 Votes
Avatar
8 months ago

Why is this limited to only the watch? Real Question - is this a technical issue?


i think it has to do with which device has the most recent/constant authentication. For the iPhone, only once you unlock with touchID, only then it is considered authenticated. Since anyone can take your phone and place it near your mac to unlock it.

With the watch, from the moment you put it on AND authenticate it with your iPhone touchID, the watch will always be considered authenticated. Until you remove the watch.

Can anyone please verify my theory? remove the watch off your wrist and try to unlock your Mac.

i'm sure apple can set it up to work with your phone. but that would require you to use touchID on your phone every time. Apple being apple, I assume would rather take the most seamless path. I honestly wouldn't mind using the phone as a second method. Maybe with the next update?
Rating: 6 Votes
Avatar
8 months ago

Probably limiting it so you buy a new computer.


Now they just need to release said new computers.
Rating: 5 Votes
Avatar
8 months ago
I have Continuity and Handoff on my Late-2012 rMBP, so I'm anxious to see if this works for me.
Rating: 4 Votes
Avatar
8 months ago

Same here. I can't think of any technical reason that this wouldn't work. I'd be shocked if it doesn't work on a 2012 rMBP. Oh wait, this is Apple. Wouldn't shock me in the slightest.

Probably limiting it so you buy a new computer.
Rating: 4 Votes
Avatar
8 months ago

I honestly wouldn't mind using the phone as a second method. Maybe with the next update?

Like I've said before, won't happen. Apple has plenty of Watches to sell. If the iPhone could be used instead, even slightly less intuitively, there goes a major selling point.
Rating: 3 Votes
Avatar
8 months ago

Works fine with MacID (a 3rd party solution). Any other excuses Apple can come up with?


Explain how MacID is resistant to relay and amplifier attacks, especially at short distances.

How does MacID prevent this from happening?
https://www.wired.com/2016/03/study-finds-24-car-models-open-unlocking-ignition-hack/

Perhaps you should learn a little more about computer security before criticizing.
Rating: 3 Votes
Avatar
8 months ago
Why is this limited to only the watch? Real Question - is this a technical issue?
Rating: 3 Votes
Avatar
8 months ago

I have Continuity and Handoff on my Late-2012 rMBP, so I'm anxious to see if this works for me.


Same here. I can't think of any technical reason that this wouldn't work. I'd be shocked if it doesn't work on a 2012 rMBP. Oh wait, this is Apple. Wouldn't shock me in the slightest.
Rating: 3 Votes
Avatar
8 months ago

It works as mentioned on my 12" MacBook.

However I disabled the features, as it required me to have a passcode on watch and I dislike having a passcode on watch, as its a hindrance to quick use.

Hopefully the future updates, will give an option to have it on watch without passccode.

It's not a big hindrance, you only have to enter the passcode once when you first put your watch on.
Rating: 2 Votes
[ Read All Comments ]