Knock. Use your iPhone as a password for your Mac.

Help / Compatibility


  • What do I need to use Knock?

    To use Knock, you'll need two things: 
    1) An iPhone running iOS 7 or later 
    2) A Mac that supports Bluetooth Low Energy

    Knock is compatible with iOS 8 and OS X Yosemite. 

    Nov 26, 2014 12:30PM PST
  • Which Macs support Bluetooth Low Energy?

    MacBook Pro: 2012 or newer 
    MacBook Air: 2011 or newer 
    MacBook: 2015 or newer
    Mac Mini: 2011 or newer 
    iMac: 2012 or newer
    Mac Pro: 2013 or newer

    Dec 07, 2015 10:57AM PST
  • How can I tell which Mac I have?

    The fastest way to tell if your Mac is compatible is to download Knock for Mac. It's free, and we'll let you know if your Mac works with Knock as soon as you open the app.

    Nov 13, 2013 10:22AM PST
  • My Mac isn't compatible, now what?

    Not to worry! You can use a low-cost Bluetooth 4.0 dongle on your older Mac to use Knock. We officially support the IOGear Bluetooth 4.0 USB dongle. Many other Bluetooth 4.0 dongles will likely work, but we have not fully tested them. If you already have a Bluetooth 4.0 dongle and can't get Knock working, please email 

    If you purchased the iPhone app, and can't get a dongle you can learn how to request a refund here

    Jan 02, 2015 05:14PM PST
  • Do other Bluetooth devices interfere with Knock?

    If Knock is not connecting or is very slow when you wake up your Mac, it may because your Mac is having trouble talking to other Bluetooth devices that are paired to your Mac. If you have a keyboard, mouse or other input device paired to your Mac, Knock must wait until these devices are connected before it has a chance to connect to your phone. In the worst case – for example, if your Mac is not near the keyboard or mouse – this can take up to 6 seconds per device, though it is usually much faster. To avoid this delay, unpair any paired Bluetooth input devices or make sure your Mac is within range of them before waking your Mac up from sleep. We know this isn’t a great solution, but unfortunately it is currently a limitation in Mac OS X.
    If you have tried the above steps and are still experiencing slow connections please contact us so we can investigate further.

    May 07, 2015 05:00PM PDT
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