

It turns out that Apple quietly modified the minimum specs during the Sierra beta period.

Yet, when I checked the Security and Privacy section, I didn’t see the checkbox for the Watch Unlock to be enabled. I installed Sierra and updated all my other devices and even enabled iCloud Two-Factor Authentication to be sure. I checked my personal MacBook against the original specs and found everything in order. You also need a few other things, like Bluetooth enabled and a Watch running WatchOS 3. The tech specs list the 2013 MacBook and higher as the minimum model needed to enable Watch Unlock on your Mac. Why? Turns out, the answer involves some pretty cool tech. One of the benefits of upgrading to MacOS 10.12 Sierra is the ability to unlock my Mac laptop with my Apple Watch.
