In October 1999, Apple released OS 9.0, heralding it as “The Best Internet Operating System Ever.”
With Sherlock 2, Internet Explorer 5 for the Mac, iTools, improved TCP/IP, and more, OS 9 connected Mac users to the Web in a way that no OS had ever done before.
With all these features, OS 9 was still very closely tied to the previous revisions of the Mac OS, and thus, was riddled with bugs and legacy code. The dreaded bomb error, for example, endeared users to the OS for years. With no memory protection, application crashes would very often bring down the entire system. Fun stuff.
With OS X’s rocky release in 2001, many people clung to OS 9 machines until the release of 10.2 in August 2002. Apple recognized this, and offered “Classic,” which allowed OS 9 apps to run in OS X. As applications were re-written for OS X, users slowly migrated
Six years later, OS X has evolved into a stable, mature OS with more and more users each year switching from the PC. Three things have forced the Macintosh community away from OS 9 in recent years:
1. Boot Sequences on Macs: At first, Macs shipping with OS X and OS 9 booted into 9, but gradually, OS X came as default. Eventually Macs would not boot into 9 at all. The 867Mhz/1Ghz Titanium PowerBooks and 867Mhz/1Ghz “Mirror Drive Door” PowerMac G4s were the last machines that could boot into 9. Classic, however, was powerful enough for most users to get by with their remaining OS 9 apps.
2. The Move to Intel: When Apple announced they were moving from the PowerPC architecture to the Intel, it meant many things: Faster Macs that ran cooler, the ability to run other x86 OS’s, and the death of Classic.
3. Leopard: With the release of OS X Leopard, Apple removed support for the Classic environment for PowerPC users, sealing OS 9’s tomb.
OS 9 is pretty much only useful for two groups of people: hobbyists and people with few computing needs. Other than that, OS 9 is dead. Steve even buried it.