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Mac OS 9.1 Updater is designed to support today's Mac OS 9 customers and ease the transition for tomorrow's Mac OS X customers. The Mac OS 9.1 upda te delivers additional support for Multiple Users and iTools services, and Sherlock 2 has a new channel, Entertainment, making it easy to find movi e reviews or your favorite song.
Note: The 6100, 7100, and 8100 class Apple computers require a Mac OS 9.1 full install CD to upgrade to Mac OS 9.1. Also, the Mac OS X Public Beta and Mac OS 9.1 are not compatible. If you install Mac OS 9.1, the Classic environment in the Mac OS X Public Beta will no longer function.