Throughout the early 1990s, Apple had tried to create a "next-generation" OS to succeed its classic Mac OS through the Taligent, Copland and Gershwin projects, but all of them were eventually abandoned.
In 2011, Apple released Mac OS X 10.7 Lion, which no longer supported 32-bit Intel processors and also did not include Rosetta.
All versions of the system released since then run exclusively on 64-bit Intel CPUs and do not support Power PC applications.
With increasing popularity of the internet, Apple offered additional online services, including the . It later began selling third-party applications through the Mac App Store.
Newer versions of Mac OS X also included modifications to the general interface, moving away from the striped gloss and transparency of the initial versions.
The project was first code named "Rhapsody" and then officially named Mac OS X.
Mac OS X was originally presented as the tenth major version of Apple's operating system for Macintosh computers; current versions of mac OS retain the major version number "10".Releases of Mac OS X from 1999 to 2005 can run only on the Power PC-based Macs from the time period.After Apple announced that they were switching to Intel CPUs from 2006 onwards, a separate version of Mac OS X 10.4 Tiger was made and distributed exclusively with early Intel-based Macs; it included an emulator known as Rosetta, which allowed users to run most Power PC applications on Intel-based Macs.An initial, early version of the system, Mac OS X Server 1.0, was released in 1999.The first desktop version, Mac OS X 10.0, followed in March 2001.Apple changed the original name "Mac OS X" to "OS X" in 2012 and then to "mac OS" in 2016, adopting the nomenclature that it uses for their other operating systems, i OS, watch OS, and tv OS.