
Macs built after 2003 will only boot Mac OS X (including the PowerPC 970 Macs, which according to current test results generate a sizeable performance gap in relation to their predecessors), so your performance will generally be limited if you choose to stay in a Mac OS 9 environment. Why stick with Mac OS 9? Performance and future app development While Apple has done its best with the Classic environment, it can hardly be considered a transparent part of the interface, and is even further from being transparently compatible with older hardware and software offerings. In a perfect world, the transition to Mac OS X would be just as smooth, and compatibility with older products just as transparent. The PowerPC processor ? a RISC replacement for the aging but venerable 68K line ? opened new doors for performance while allowing virtually transparent compatibility with non-optimized applications, which at the time included the Mac OS. In the mid-1990's, the Mac community went through a technically significant but surprisingly fluid (thanks in large part to developer software product Metrowerks) transition. Troubleshooting Techniques Descriptions of, and workarounds for, the most common problems, and a list of penalties for sticking with an OS 9 booting Mac.

Living in a modern OS world: Booting Mac OS 9 on 2003 (Mac OS X only) Macs.Why stick with Mac OS 9? Performance and future app development.Our next installment is entitled the "Mac OS 9 Refugee Manual, Part 1," and covers the following topics:

Earlier this month the report "A Switch campaign of a different kind: Why people are sticking with Mac OS 9, and what will make the Mac OS X shift happen" generated tremendous response.
