Mac OS 9

Mac OS 9
Version of the classic Mac OS operating system
Developer	Apple Computer
OS family	Macintosh
Working state	Historic, unsupported
Source model	Closed source
Released to; manufacturing	October 23, 1999; 27 years ago
Latest release	9.2.2 / December 5, 2001; 24 years ago
Platforms	PowerPC
Kernel type	Nanokernel
Default; user interface	Apple Platinum
License	Proprietary
Preceded by	Mac OS 8
Succeeded by	Mac OS X 10.0; Mac OS X Server 1.0;
Official website	Apple - Products - Mac OS 9 at the Wayback Machine (archived November 9, 2000)
Support status
	Historical, unsupported as of February 1, 2002

Mac OS 9 is the ninth and final major release of Apple's classic Mac OS operating system, which was succeeded by Mac OS X 10.0 in 2001, starting the Mac OS X family of operating systems. Introduced on October 23, 1999, it was promoted by Apple as "The Best Internet Operating System Ever", highlighting Sherlock 2’s Internet search capabilities, integration with Apple's free online services known as iTools and improved Open Transport networking. While Mac OS 9 lacks protected memory and full pre-emptive multitasking, lasting improvements include the introduction of an automated Software Update engine and support for multiple users.

Apple discontinued development of Mac OS 9 in late 2001, transitioning all future development to Mac OS X. The final updates to Mac OS 9 addressed work problems with Mac OS X while running in the Classic Environment and works with Carbon applications. At the 2002 Worldwide Developers Conference, Steve Jobs began his keynote address by staging a mock funeral for OS 9.

References

↑ "October 23, 1999: Mac OS 9 Released". AppleMatters. Retrieved 2009-11-28.
↑ "October 23, 1999: Mac OS 9 Released [Archive] - Mac Forums". Archived from the original on 2013-10-19. Retrieved 2009-11-28.
↑ "October 23, 1999: Mac OS 9 Released MacBytes.com". MacRumors.com. Archived from the original on 2013-10-19. Retrieved 2009-11-28.
↑ "Mac OS 9.2.2: Document and Software". www.support.apple.com. Archived from the original on 2024-03-06. Retrieved 2025-04-17.
↑
↑ "October 23, 1999: Mac OS 9 Released". AppleMatters.com. Archived from the original on 2009-10-28. Retrieved 2009-11-28.
↑ "Re: newbie question: What is a Blue Task". Apple.com. Archived from the original on 2007-10-13. Retrieved 2007-03-29.
↑ "Apple WWDC 2002-The Death Of Mac OS 9". YouTube.com. Archived from the original on 2010-04-18. Retrieved 2010-03-16.

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[1] "October 23, 1999: Mac OS 9 Released". AppleMatters. Retrieved 2009-11-28.

[October_23,_1999:_Mac_OS_9_Released_[Archive]_-_Mac_Forums-2] "October 23, 1999: Mac OS 9 Released [Archive] - Mac Forums". Archived from the original on 2013-10-19. Retrieved 2009-11-28.

[October_23,_1999:_Mac_OS_9_Released_-_MacBytes.com-3] "October 23, 1999: Mac OS 9 Released MacBytes.com". MacRumors.com. Archived from the original on 2013-10-19. Retrieved 2009-11-28.

[4] "Mac OS 9.2.2: Document and Software". www.support.apple.com. Archived from the original on 2024-03-06. Retrieved 2025-04-17.

[5] ↑

[October_23,_1999:_Mac_OS_9_Released-6] "October 23, 1999: Mac OS 9 Released". AppleMatters.com. Archived from the original on 2009-10-28. Retrieved 2009-11-28.

[Pre-emptive_Multitasking-7] "Re: newbie question: What is a Blue Task". Apple.com. Archived from the original on 2007-10-13. Retrieved 2007-03-29.

[Apple_WWDC_2002-The_Death_Of_Mac_OS_9-8] "Apple WWDC 2002-The Death Of Mac OS 9". YouTube.com. Archived from the original on 2010-04-18. Retrieved 2010-03-16.