AirDrop is an ad-hoc service in Apple Inc.'s iOS and macOS operating systems, introduced in Mac OS X Lion (Mac OS X 10.7) and iOS 7, which enables the transfer of files among supported Macintosh computers and iOS devices over Wi-Fi and Bluetooth, without using mail or a mass storage device.
AirDrop on macOS.
|Initial release||July 20, 2011|
|Operating system||iOS 7 and later|
OS X 10.7 Lion and later
|Platform||iPhone 5 and later|
iPad (4th generation) and later
iPad Mini (1st generation) and later
iPod Touch (5th generation) and later
|License||Bundled proprietary software|
|Website||AirDrop on iOS|
AirDrop on macOS
Prior to OS X Yosemite (OS X 10.10), and under OS X Lion, Mountain Lion, and Mavericks (OS X 10.7–10.9, respectively) the AirDrop protocol in macOS was different from the AirDrop protocol of iOS, and the two were therefore not interoperable with each other. OS X Yosemite and later support the iOS AirDrop protocol, which is used for transfers between a Mac and an iOS device as well as between two 2012 or newer Mac computers, and which uses both Wi-Fi and Bluetooth. [failed verification]
There is no restriction on the size of the file which AirDrop will accommodate.
On iOS 7 and later, AirDrop can be accessed by either tapping on Settings > General > AirDrop, or swiping up the home screen through Control Center. Both Wi-Fi and Bluetooth are automatically switched on when AirDrop is enabled as they are both utilized.
Options for controlling AirDrop discovery by other devices include:
- No one can see device (Airdrop disabled)
- Only contacts can see device
- Everyone can see device.
In iOS 7 or later, if an application implements AirDrop support, it is available through the share button. AirDrop is subject to a number of restrictions on iOS, such as the inability to share music or videos from the native apps.
On Macs running macOS 10.7 and greater, AirDrop is available in the Finder window sidebar. On Macs running OS X 10.8.1 or later, it can also be accessed through the menu option Go → AirDrop or by pressing ⇧ Shift+⌘ Cmd+R.
Wi-Fi must be turned on in order for AirDrop to recognize the other device. The other device must also have AirDrop selected in a Finder window sidebar to be able to transfer files. Furthermore, files are not automatically accepted; the receiving user must accept the transfer. This is done to improve security and privacy.
Transfer between two iOS devicesEdit
- iPhone 5 or newer
- iPad (4th generation) or newer
- iPad Pro: all models
- iPad Mini: all models
- iPod Touch (5th generation) or newer
AirDrop can be enabled unofficially on iPad (3rd generation). Although not supported by default, AirDrop can be enabled by jailbreaking the device and installing "AirDrop Enabler 7.0+" from Cydia. This procedure is not supported or recommended by Apple, as engaging in jailbreaking can cause software instability, and introduce viruses. This procedure often, if not always, voids the warranty of the device.
Transfer between two Mac computersEdit
- MacBook Pro: Late 2008 or newer, excluding late 2008 17-inch
- MacBook Air: Late 2010 or newer
- Aluminum MacBook: Late 2008
- MacBook and iMac: Early 2009 or newer
- Mac Mini: Mid 2010 or newer
- Mac Pro: Early 2009 with AirPort Extreme card, or mid 2010 or newer
Transfer between a Mac and an iOS deviceEdit
- MacBook Air: Mid 2012 or newer
- MacBook (Retina): all models
- MacBook Pro: Mid 2012 or newer
- iMac: Late 2012 or newer
- iMac Pro: all models
- Mac Mini: Late 2012 or newer
- Mac Pro: Late 2013 or newer
Bluetooth and Wi-Fi have to be turned on for both Mac and iOS devices. (Both devices are not required to be connected to the same Wi-Fi network.)
Security and privacyEdit
AirDrop uses TLS encryption over a direct Apple-created peer-to-peer Wi-Fi connection for transferring files. The Wi-Fi radios of the source and target devices communicate directly without using an Internet connection or Wi-Fi Access Point.
The technical details of AirDrop and the proprietary peer-to-peer Wi-Fi protocol called Apple Wireless Direct Link (AWDL) have been reverse engineered and the resulting open source implementations published as OWL and OpenDrop.
There have been numerous reported cases where iOS device users with AirDrop privacy set to “Everyone” have received unwanted files from nearby strangers; the phenomenon has been termed "cyber-flashing." Users have the full ability to control their AirDrop settings and limit who can send them files, with options for "Everyone", "Contacts Only", or "Off".
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- Milan Stute; Sashank Narain; Alex Mariotto; Alexander Heinrich; David Kreitschmann; Guevara Noubir; Matthias Hollick (2019). A Billion Open Interfaces for Eve and Mallory: MitM, DoS, and Tracking Attacks on iOS and macOS Through Apple Wireless Direct Link. 28th USENIX Security Symposium (USENIX Security '19).
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