Mac OS 9 was the last, conventional version of the operating system Mac OS for Macintosh computers of Apple. It was published on 23 October 1999, which became last updates version 9.2.2 on 5 December 2001 published.

Mac OS 9 before its publication in developer versions Mac OS 8,7 designated and indeed are the changes, Apple in the half version step from 8.1 to 8.5 made more largely, than those from 8.6 to 9. The jump in the version number is to be justified also by the fact that Apple for Mac OS X, the new generation of the operating system, which wanted to approximate 10. Around the sales to promote Apple led the first free iTools (later. Mac), above all the free E-Mail account contained, presupposed however Mac OS 9 for the registration.

The most important innovations of Mac OS 9 were multi-user support and the key federation technology, with which a central repository for passwords was introduced.

The versions starting from 9.0.4 were loaded from Mac OS X in the Classic environment, in order older programs, which do not run under Mac OS X, load to be able.

After the publication of version 9.2.2 Apple boss Steve job announced the development of Mac OS 9 in May 2002, is not any longer continued. In January 2003 Mac was sold to the first power, which no more Mac OS 9 boats could, which became last Macs in the summer 2004 sold. The execution of Mac - OS-9-Programmen in the Classic environment is further possible for Mac-OS-9-Programme on all PowerPC Macs, on the Macintosh computers with Intel processors, introduced starting from 2006, is not however no more supported.

Related links

• Apple Technote 1176 over Mac OS 9
• Apple Mac OS 9 "support "- side

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