Mac OS yosemite, Leopard, Snow Leopard, Lion, Mountain Lion, El Capitan, Mavericks
Mac OS is the computer operating system for Apple Computer's Macintosh line of personal computers and workstations. A popular feature of its latest version, Mac OS X , is a desktop interface with some 3-D appearance characteristics. OS X has a modular design intended to make it easier to add new features to the operating system in the future. It runs UNIX applications as well as older Mac applications.
This is the operating system that runs on Macintosh computers. It is pronounced, "mack-oh-es." The Mac OS has been around since the first Macintosh was introduced in 1984. Since then, it has been continually updated and many new features have been added to it. Each major OS release is signified by a new number (i.e. Mac OS 8, Mac OS 9).
Since the core of the Mac OS was nearly decades old, Apple decided to completely revamp the operating system. In March of 2001, Apple introduced a completely new version of the Mac OS that was written from the ground up. The company dubbed it "Mac OS X," correctly pronounced "Mac OS 10." Unlike earlier versions of the Mac OS, Mac OS X is based on the same kernel as Unix and has many advanced administrative features and utilities. Though the operating system is much more advanced than earlier versions of the Mac OS, it still has the same ease-of-use that people have come to expect from Apple software.
2002 Apple introduces macOS X 10.2 code named Jaguar and becomes available on August 23, 2002.
2003 Apple introduces macOS X 10.3 code named Panther October 25, 2003.
2004 Apple introduces macOS X 10.4 code named Tiger at the WWDC on June 28, 2004.
2007 Apple introduces macOS X 10.5 code named Leopard October 26, 2007.
2008 Apple introduces MobileMe at the WWDC on June 9, 2008.
2009 Apple introduces macOS X 10.6 code named Snow Leopard at the WWDC on June 8, 2009.
2010 Apple introduces macOS X 10.7 code named Lion at the "Back to the Mac" event on October 20, 2010.
2012 Apple releases macOS X 10.8 code named Mountain Lion on July 25, 2012.
2013 Apple introduces macOS X 10.9 code named Mavericks at the WWDC on June 10, 2013.
2014 Apple introduces macOS X 10.10 code named Yosemite at the WWDC on June 2, 2014.