Knock, a newly released app for both iOS and Mac, is designed to allow users to unlock their Macs via Bluetooth with an iPhone, replacing traditional password logins.

After downloading the Knock app for iOS and the accompanying app for the Mac, an iPhone can unlock a connected Mac with two knocks on the back of the iPhone. The iOS app pairs specifically with the Mac app, which creates a secure connection between the two, and the process does not require opening the Knock app.

Faster and safer than typing a password, for iOS and Mac.

You keep your iPhone with you all the time. Now you can use it as a password. You never have to open the app— just knock on your phone twice, even when it's in your pocket, and you're in.

Using Knock won't drain your iPhone's battery, even if you use it all day every day. Knock securely communicates with your Mac using Bluetooth Low Energy, a new technology that draws very little power.

Because it uses Low Energy Bluetooth 4.0, Knock is compatible with the iPhone 4s or newer, along with the 2011 MacBook Air or newer, the 2012 MacBook Pro or newer, the 2012 iMac or newer, the 2011 Mac mini or newer and the 2013 Mac Pro.

Knock for iOS can be downloaded from the App Store for $3.99 [Direct Link]. The accompanying Mac app can be downloaded from the Knock website for free.

Top Rated Comments

Reason077 Avatar
97 months ago
And if your iPhone breaks somehow, how do you access your mac then?
Due to the advanced security, it's impossible. You need to buy a new Mac.
Score: 33 Votes (Like | Disagree)
0160033 Avatar
97 months ago
Broken iPhone incoming.

Hey don't Knock it till you try it
Score: 28 Votes (Like | Disagree)
3bs Avatar
97 months ago
And if your iPhone breaks somehow, how do you access your mac then?

Just type in the password?
Score: 15 Votes (Like | Disagree)
Reason077 Avatar
97 months ago
The guy in the video looks like a giant douche with his silly beard. I'd like to "knock" him. In the face.
Score: 15 Votes (Like | Disagree)
unplugme71 Avatar
97 months ago
My iPhone has a cracked screen. I knocked. Cut my hand. Bleeding

Just called my lawyer..
Score: 14 Votes (Like | Disagree)
3bs Avatar
97 months ago
'Knock' iOS App Uses Bluetooth 4.0 to Replace Password Unlocking on Macs

Just make sure you remember to knock the back of your iPhone!

Unless you have a naked iPhone 4S, that is. Given how easily I've seen the backs of iPhone 4/4S break, knocking it anywhere is probably best avoided.
I think you're exaggerating. They said knock, not punch :p

Sure drops might break it but simply knocking can't possibly break the back unless there was already serious structural damage.
Score: 9 Votes (Like | Disagree)

Top Stories

Top Stories 57 Feature

Top Stories: Apple Event Next Tuesday, Mini-LED iPad Pro, iPhone Rumors

Saturday April 17, 2021 6:00 am PDT by
It feels like we've been waiting forever for new Apple products, but the wait is almost over as Apple has announced a media event for next Tuesday, so make sure to tune into MacRumors for full coverage of everything Apple announces. While that was the big news this week, we also got some new details on Apple's iPhone plans for 2022 and 2023 courtesy of analyst Ming-Chi Kuo, and we also saw...
flat imac 3d 3 teal

Reliable Leaker Hints Redesigned Colorful iMac to Debut at 'Spring Loaded' Event

Saturday April 17, 2021 4:43 am PDT by
Reliable leaker known as l0vetodream has hinted that Apple may debut its rumored redesigned and colorful iMac at its "Spring Loaded" event on Tuesday, April 20. In a tweet, the leaker posted an image of Apple's logo used for marketing the upcoming event and an image of the retro rainbow Apple logo alongside the colorful lineup of G3 iMacs. Apple leaker Jon Prosser previously reported that...
third gen Apple pencil leaked video

Video of Alleged Third-Generation Apple Pencil Leaks Ahead of Apple Event

Friday April 16, 2021 6:13 am PDT by
A video purporting to be of the third-generation Apple Pencil has today been shared online, showing a glossy finish that mirrors previous leaks. New ✏️ ready to 🚢 #AppleEvent @TommyBo50387266 pic.twitter.com/s4RCDwDi5M— 漢尼斯·拉斯納 🇨🇳 (@ileakeer) April 16, 2021 The brief video from Twitter account @ileakeer, spotted by 9to5Mac, shows an Apple Pencil with a glossy finish much like the...
important battery message iphone 11

Some iPhone 11 Users Seeing Increased Battery Health Percentages After iOS 14.5 Recalibration Process

Friday April 16, 2021 6:32 am PDT by
In the sixth beta of iOS 14.5, Apple introduced a recalibration process for the battery health reporting system on the iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max to address inaccurate battery health estimates for some users. Apple said this process might take a few weeks to be completed, and now that two weeks have passed since the sixth beta of iOS 14.5 was released, some users are...
duan rui iphone 12 13 notch

New Images Show Smaller iPhone 13 Notch Compared to iPhone 12

Saturday April 17, 2021 11:38 pm PDT by
Leaker known as "DuanRui" has shared more images that could give us our best look yet at Apple's redesigned notch for the iPhone 13. The new pictures follow similar images shared by the leaker last week, but the latest shots include a comparison with the existing iPhone 12 notch. DuanRui posted three images on Twitter that apparently originate from Weibo, although source details remain...
iphone 13 pro max cads eap

iPhone 13 Series CAD Leaks Reveal Larger Camera Dimensions

Friday April 16, 2021 1:53 am PDT by
Information and alleged CADs of the upcoming iPhone 13 series, shared in a video from EverythingApplePro, indicates that Apple plans to make this year's iPhone camera module significantly bigger, likely to make way for larger sensors and sensor-shift stabilization. According to the CADs shared in the video, the iPhone 13 mini, Pro, and Pro Max camera module will all be a "perfect square."...
maxresdefault

Hands-On With Anker's MagSafe-Compatible Battery Pack

Thursday April 15, 2021 9:39 am PDT by
Anker, a company known for its range of accessories designed for Apple products, recently came out with one of the first MagSafe-compatible battery packs, so we thought we'd check it out to see how it compares to a standard battery pack. Subscribe to the MacRumors YouTube channel for more videos. Design wise, Anker's power bank looks like a typical battery pack, but it has magnets built in...
apple event spring loaded

Apple's 'Spring Loaded' Event Officially Announced for Tuesday, April 20

Tuesday April 13, 2021 9:04 am PDT by
Following an overnight leak by Siri, Apple today officially announced that it will be holding a special "Spring Loaded" event on Tuesday, April 20 at 10:00 a.m. Pacific Time at the Steve Jobs Theater on the Apple Park campus in Cupertino, California. As with all of Apple's 2020 events, the April 2021 event will be a digital-only gathering with no members of the media invited to attend in...
iphone 12 120hz thumbnail feature

LTPO Displays Supporting 120Hz Refresh Rates Again Rumored for iPhone 13 Pro Models

Friday April 16, 2021 10:01 am PDT by
The two higher-end "iPhone 13 Pro" models that are coming in 2021 are expected to use LTPO display technology to enable 120Hz refresh rates, according to display analyst Ross Young. Young reaffirmed the detail in a tweet that said he'd heard rumors about only one model featuring LTPO, which he says is inaccurate. Heard some rumors in the industry and media that there would only be one ...
apple music

Apple Music Tops Spotify With One Cent Paid Per Stream

Friday April 16, 2021 6:44 am PDT by
In a letter slated to be shared with artists today through the Apple Music for Artists dashboard, obtained by The Wall Street Journal, Apple has reportedly revealed that it pays music rights holders one cent per song streamed on Apple Music. The report claims that Apple Music's payment structure is thus roughly double what Spotify pays music rights holders per stream, which averages to about ...