IMessage
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| Developer | Apple Inc. |
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| Type | Instant messaging service |
| Launch date | October 12, 2011 |
| Operating system | iOS, macOS, watchOS |
| Status | Active |
| Website | support |
iMessage is an instant messaging service developed by Apple Inc. It is supported by the Messages application in iOS 5 and later and OS X Mountain Lion and later.
iMessage was announced by Scott Forstall at the WWDC 2011 keynote on June 6, 2011. A version of the iOS Messages application with support for iMessage was included in the iOS 5 update on October 12, 2011.
On February 16, 2012, Apple announced that a new OS X Messages application with support for iMessage, replacing iChat, would be part of OS X Mountain Lion. Mountain Lion, with Messages, was released on July 25, 2012.
On October 23, 2012, Apple CEO, Tim Cook announced that Apple device users have sent 300 billion messages using iMessage and that Apple delivers an average of 28,000 messages per second. In February 2016, Eddy Cue announced that the number of iMessages sent per second has now grown to 200,000.
In May 2014, a lawsuit was filed against Apple over an issue that, if a user switches from an Apple device to a non-Apple device, messages being delivered to them through iMessage would not reach their destination. In November 2014 Apple addressed this problem by providing instructions and an online tool to deregister iMessage. A federal court dismissed the suit in Apple's favor.
On March 21, 2016, a group of researchers from Johns Hopkins University published a report in which they demonstrated that an attacker in possession of iMessage ciphertexts could potentially decrypt photos and videos that had been sent via the service. The researchers published their findings after the vulnerability had been patched by Apple.
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