In Short

OS X is Apple's desktop and laptop computer operating system, and the software that powers the Mac. Based on BSD UNIX and technologies developed at NeXT, which Apple acquired in 1996, it was first released as a public beta code-named Kodiak in 2001. The current version, OS X Mavericks, was publicly unveiled at WWDC 2013 and released in the fall. The next version, OS X 10.10 is currently under development under the codename Syrah. It is expected to be shown off at WWDC 2014 on June 2.

OS X is Apple's desktop and laptop computer operating system, and the software that powers the Mac. Based on BSD UNIX and technologies developed at NeXT, which Apple acquired in 1996, it was first released as a public beta code-named Kodiak in 2001. The current version, OS X Mavericks, was publicly unveiled at WWDC 2013 and released in the fall. The next version, [OS X 10.10 Yosemite](http://www.imore.com/os-x-1010, was )shown off at WWDC 2014 on June 2 2014. Next in line — OS X El Capitan — officially arrived on Mac on September 30, 2015.