MavericksEditCreated 10/23/2013, updated 10/14/2017Mavericks is the 10.9 release of OS X, released on 22 October 2013. For other release dates, see OS X timeline. See also "The" review, from John Siracusa: http://arstechnica.com/apple/2013/10/os-x-10-9/ macoswiki