KnockWhat just happened Here's that again Your Mac Your iPhone Unlocked over Super secure Low power Bluetooth All you do is Get the iPhone app for the introductory price of $3.99. Introducing Knock 2.0 Knock and Apple Watch are a match made in heaven. Knock 2.0 takes full advantage of Apple Watch, making unlocking your Mac faster and more secure than ever before. When you put on your Apple Watch, Touch
