OS X 10.9 Mavericks: The Ars Technica Review

After a dozen years and nine major releases, OS X has had a full life: the exuberance of youth, gradually maturing into adulthood, and now, perhaps, entering its dotage. When I am an old operating system I shall wear… leather?

The 2011 release of OS X 10.7 Lion seemed to mark the natural endpoint of the “big cat” naming scheme. But Apple couldn’t resist the lure of the “cat, modifier cat” naming pattern, releasing OS X 10.8 Mountain Lion a year later. Perhaps it just wanted to give its cat nine lives.