

Auto-correction was changed to have an iOS-like popup box.Support for the Apple Push Notification Service has been added which sends over-the-air alerts.ASLR has been added which puts important data in unpredictable parts of the system, making it harder to target known weaknesses.
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It allows two Macs running Mac OS X Lion to share and send files via Wi-Fi Direct.
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A later update in October 2011 added iCloud support.The ability to save and browse past versions of documents for applications in a Time Machine like UI has been added.New multi-touch gestures have been added.The user can add multiple pages and can create folders to organize apps in. It is an application launcher that features a design similar to the iOS home screen. It is also the last version of Mac OS X to be released under the old release schedule in which every version of Mac OS X was released every two years as the operating system shifted to a new annual update schedule starting with the aforementioned version. It is the last version to be released under the Mac OS X name as the operating system's branding was shortened to OS X starting with the release of OS X Mountain Lion in 2012. Although, Apple would later release a USB flash drive containing the installation image in August 2011. It is the first version of Mac OS X to not be distributed on optical discs as it was released as an online-only download through the Mac App Store.

It introduced the Launchpad and was originally only released as an App Store update that could only be updated normally from Snow Leopard.

This version dropped support for the x86 userland and architecture and removed Rosetta and Front Row. It was announced on 20 October 2010 at Apple's Back to the Mac event. Mac OS X Lion, or Mac OS X 10.7, is the eighth major release of the Mac OS X operating system released on 20 July 2011.
