New app lets you unlock your Mac with your iPhone

A new iPhone app called Knock will allow users to “knock” on their iPhone and unlock their Mac through bluetooth.

Mac and iPhone owners can say goodbye to unlocking their computer with a password thanks to the new app Knock. Launching today for $3.99, Knock allows a Mac to be unlocked just by knocking on a paired iPhone. The two devices connect over Bluetooth LE, allowing a phone to automatically detect when it nears a paired computer. Though the knocking effect can also be achieved by waving an iPhone in the air, Knock suggests just tapping on it through your pants’ pocket, so you never have to pick up the device.

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