Mac OS 9.1 Update - International English
Before you download Mac OS 9.1 Update, please be certain that you have read the system requirements for this update.
System Requirements:
  • International English Mac OS 9.0 or higher
  • Any PowerPC-based Apple computer with at least 32 MB of physical RAM, with virtual memory set to at least 64 MB.
    Note: Third party PowerPC upgrade cards are not supported
Compatibility Information: Mac OS 9.1 and Mac OS X Public Beta - Important: 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.
Option 1 - Multiple Part Download
Below are the links for a multiple part download of the Mac OS 9.1 Update.
  • Please read the system requirements above to make sure that your are downloading the correct update for your system and language.
  • Once you have all the parts downloaded, go to your hard drive and double-click on "Mac OS 9.1 Update.smi" mounting the disk image on your desktop.
  • Read the documents included on this disk image before installing the software.

Download Part 1
Download Part 2
Download Part 3
Download Part 4

Download Part 5
Download Part 6
Download Part 07
Download Part 8

Download Part 9
Download Part 10
Download Part 11
Download Part 12

Download Part 13
Download Part 14
Download Part 15
Option 2 - Order CD
Apple recognizes that for many customers, downloading the update may not be convenient. Apple is offering the Mac OS 9 to Mac OS 9.1 Software Update program to allow customers who own any version of Mac OS 9 to obtain the Mac OS 9.1 full install CD. Details and an order form are available at www.apple.com/macos/

Note: If you have any of the following Macintosh computers:

  • Power Macintosh 6100 series
  • Power Macintosh 7100 series
  • Power Macintosh 8100 series
  • Power Macintosh 8115
  • Workgroup Server 6150
  • Workgroup Server 8150
  • Workgroup Server 9150
you must order the CD to upgrade to 9.1. For more information please see the following KnowledgeBase article.
Please send any comments on this page to:
G.Mills@compserv.gla.ac.uk
(George W. Mills, Computing Service, University of Glasgow)