When Did Apple End Support for Mac OS 9?

Apple officially ceased all active development for Mac OS 9 in May 2002, marking the end of the classic Macintosh operating system era. While the operating system received its final maintenance update in late 2001, Apple formally announced the termination of development during its annual developer conference in May 2002. Over the following years, hardware compatibility and legacy emulation were gradually eliminated, completing the transition to Mac OS X.

The Official End of Development: May 2002

During the Worldwide Developers Conference (WWDC) on May 6, 2002, Steve Jobs staged a mock funeral for Mac OS 9, complete with a coffin and eulogy. This theatrical presentation served as Apple's official declaration that all future development of Mac OS 9 had ceased. Apple instructed software developers to halt work on classic Mac applications and focus exclusively on Mac OS X.

The Final Software Release

The final software iteration of the operating system was Mac OS 9.2.2, which was released in December 2001. This update focused primarily on bug fixes and enhancing performance within the "Classic" environment inside Mac OS X, rather than introducing new features for standalone use.

Phasing Out Hardware and Legacy Support

Following the May 2002 announcement, Apple implemented a phased retirement for Mac OS 9 hardware compatibility and software support:

  • Native Booting Discontinued (2003): In January 2003, Apple began releasing new Mac models that could no longer boot natively into Mac OS 9. By mid-2003, all newly released Macintosh computers were restricted to booting exclusively into Mac OS X.
  • The Classic Environment Phased Out (2006–2007): Users could still run Mac OS 9 applications inside Mac OS X using the Classic environment on PowerPC Macs. However, when Apple transitioned to Intel processors in early 2006, Classic support was not included. Apple removed the Classic environment entirely from the operating system with the release of Mac OS X 10.5 Leopard in October 2007, permanently closing the chapter on Mac OS 9 compatibility.