what computer operating system does apple use
March 31, 2015. Apple uses its own signature operating system, which since 2001 has been derived from Unix and known as OS X. Before OS X came OS 9, otherwise known as Classic.. As of June 2014, the latest version of OS X is called Mavericks..
In 1984, Apple debuted the operating system that is now known as the Classic Mac OS with its release of the original Macintosh System Software. The system, rebranded Mac OS in 1996, was preinstalled on every Macintosh until 2002 and offered on Macintosh clones for a short time in the 1990s.