System 7 to Mac OS X Recommendations

As a general rule, it is best to us the most recent version of Macintosh system software recommended for your Macintosh - so you can take advantage of the most advanced features and enhancements. However, not all versions of system software will work on all classic Macintosh computers. The following chart shows which generations of system software are compatible with different classic Macs.

Images scanned from "Macintosh System Software User's Guide, Version 6.0", Copyright 1988, Apple Inc.