Mac OS X Lion(version 10.7) is the eighth major release of Mac OS X, Apple’s desktop and server operating system for Macintosh computers. Lion was released on July 20, 2011, as announced during Apple’s third quarter 2011 earnings report. Apple’s promotional webpages refer to it as OS X Lion, although their press release includes the “Mac”.

A preview of Lion was publicly unveiled at Apple’s “Back to the Mac” event on October 20, 2010. It will bring many developments made in Apple’s iOS, such as an easily-navigable display of installed applications, to the Mac, and will include support for the Mac App Store, as introduced in Mac OS X Snow Leopard version 10.6.6. On February 24, 2011, the first developer’s preview of Lion (11A390) was released to subscribers of Apple’s developers program. Other developer previews were subsequently released, with Lion Preview 4 (11A480b) being released at WWDC 2011. Lion achieved Golden Master status on July 1, 2011.

System requirements

* x86-64 CPU (Macs with an Intel Core 2 Duo, Intel Core i3, Intel Core i5, Intel Core i7, or Xeon processor.)
* At least 2GB of RAM
* Mac OS X 10.6.6 or later (Mac OS X 10.6.8 recommended)
* 7 GB of free hard drive space is recommended
* AirDrop is supported on the following Mac models: MacBook Pro (late 2008 or newer), MacBook Air (late 2010 or newer), MacBook (late 2008 or newer), iMac (early 2009 or newer), Mac mini (mid 2010 or newer), Mac Pro (early 2009 with AirPort Extreme card and mid 2010 or newer).

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