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Mac OS 9.1, 9.1 Update, 9.1 for iBook, iMac Early 2001, PM G4 Digital Audio

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Rating:	Select ratingPoorHistorical value onlyA worthy applicationProductivity to the maxSuper Fantastic! Your rating: None Average: 5 (2 votes)
Category:	Operating Systems
Year released:	2001
Author:	Apple
Publisher:	Apple

Download MacOS91CD.ZIP (407.12 MB)
For Mac OS 9

Download MacOS91CD_DE.ZIP (397.71 MB)
For Mac OS 9

Download MacOS91Updt_WW1.ZIP (638.21 MB)
For Mac OS 9

Download MacOS91Updt_WW2.ZIP (645.94 MB)
For Mac OS 9

Download MacOS91_Internal.ZIP (496.59 MB)
For Mac OS 9

Download iBookG391CD_Rest.ZIP (479.61 MB)
For Mac OS 9

Download iBookG391CDDE_Inst.ZIP (398.84 MB)
For Mac OS 9

Download iBookG391CD_Apps.ZIP (191.85 MB)
For Mac OS 9

Download iMacS200091CD_Inst.ZIP (445.11 MB)
For Mac OS 9

Download iMacE200191CD_Inst.ZIP (458.34 MB)
For Mac OS 9

Download iMacE200191CD_Rest.ZIP (502.10 MB)
For Mac OS 9

Download iMacE200191CDDE_Inst.ZIP (365.23 MB)
For Mac OS 9

Download iMacE200191CDv13_Inst.ZIP (445.20 MB)
For Mac OS 9

Download iMacE200191CDv11_Rest1.ZIP (574.10 MB)
For Mac OS 9

Download iMacE200191CDv11_Rest2.ZIP (617.81 MB)
For Mac OS 9

Download iMacE200191CDv11_Rest3.ZIP (559.22 MB)
For Mac OS 9

Download iMacE200191CDv11_Rest4.ZIP (123.56 MB)
For Mac OS 9

Download iMacE200191CDv11_Apps.ZIP (191.72 MB)
For Mac OS 9

Download PMG4DA91CD_Inst.ZIP (455.80 MB)
For Mac OS 9

Download PMG4DA91CD_Rest.ZIP (415.78 MB)
For Mac OS 9

Download PMG4DA91CDDE_Rest.ZIP (351.57 MB)
For Mac OS 9

Emulation
Guides on emulating older applications

MacOS91CD.ZIP: Mac OS 9.1 Retail CD-ROM image.
MacOS91CD_DE.ZIP: Mac OS 9.1 Retail CD-ROM image. (German)
MacOS91Updt_WW1.ZIP: Built CD image containing worldwide Mac OS 9.1 Update disk images. (Disc 1)
MacOS91Updt_WW2.ZIP: Built CD image containing worldwide Mac OS 9.1 Update disk images. (Disc 2)
MacOS91_Internal.ZIP: Mac OS 9.1 Internal Edition CD-ROM image.
iBookG391CD_Rest.ZIP: iBook G3 Series restoration CD-ROM v1.1 image. (Mac OS 9.1)
iBookG391CDDE_Inst.ZIP: iBook G3 Series installation CD-ROM image. (Mac OS 9.1 German)
iBookG391CD_Apps.ZIP: iBook G3 Series applications CD-ROM image.
iMacS200091CD_Inst.ZIP: iMac G3 Summer 2000 DV installation CD-ROM v1.2 image. (Mac OS 9.1)
iMacE200191CD_Inst.ZIP: iMac G3 Early 2001 installation CD-ROM image. (Mac OS 9.1)
iMacE200191CD_Rest.ZIP: iMac G3 Early 2001 restoration CD-ROM image. (Mac OS 9.1)
iMacE200191CDDE_Inst.ZIP: iMac G3 Early 2001 installation CD-ROM image. (Mac OS 9.1 German)
iMacE200191CDv13_Inst.ZIP: iMac G3 Early 2001 installation CD-ROM v1.3 image. (Mac OS 9.1)
iMacE200191CDv11_Rest1.ZIP: iMac G3 Early 2001 restoration CD-ROM Disc 1 v1.1 image. (Mac OS 9.1 + Mac OS X 10.0.3)
iMacE200191CDv11_Rest2.ZIP: iMac G3 Early 2001 restoration CD-ROM Disc 2 v1.1 image. (Mac OS 9.1 + Mac OS X 10.0.3)
iMacE200191CDv11_Rest3.ZIP: iMac G3 Early 2001 restoration CD-ROM Disc 3 v1.1 image. (Mac OS 9.1 + Mac OS X 10.0.3)
iMacE200191CDv11_Rest4.ZIP: iMac G3 Early 2001 restoration CD-ROM Disc 4 v1.1 image. (Mac OS 9.1 + Mac OS X 10.0.3)
iMacE200191CDv11_Apps.ZIP: iMac G3 Early 2001 applications CD-ROM v1.1 image.
PMG4DA91CD_Inst.ZIP: Power Mac G4 Digital Audio installation CD-ROM v1.2 image. (Mac OS 9.1)
PMG4DA91CD_Rest.ZIP: Power Mac G4 Digital Audio restoration CD-ROM v1.2 image. (Mac OS 9.1)
PMG4DA91CDDE_Rest.ZIP: Power Mac G4 Digital Audio restoration CD-ROM v1.0.1 image. (Mac OS 9.1 German)

Mac OS 9 is the final major release of Apple's Mac OS before the launch of OS X. Introduced on October 23, 1999, Apple positioned it as "The Best Internet Operating System Ever," highlighting Sherlock 2's Internet search capabilities, integration with Apple's free online services known as iTools and improved Open Transport networking. While Mac OS 9 lacks protected memory and full pre-emptive multitasking, lasting improvements include the introduction of an automated Software Update engine and support for multiple users.

Apple discontinued development of Mac OS 9 in 2002, transitioning all future development to Mac OS X. Since that time, no updates have been released. The final updates to Mac OS 9 addressed compatibility issues with OS X while running in the Classic Environment and compatibility with Carbon applications. At the 2002 World Wide Developers Conference, Steve Jobs began his keynote address by staging a mock funeral for OS 9. However, there are still users of Mac OS 9 today. Specifically retro-gamers, people using old software that was discontinued before the introduction of OS X or users of old hardware incompatible with Mac OS X. (PowerPC Macs made before the introduction of the G3 processor.)

Apple billed Mac OS 9 as including "50 New Features" and heavily marketed its Sherlock 2 software, which introduced a 'channels' feature for searching different online resources and introduced a QuickTime-like metallic appearance. Mac OS 9 also featured integrated support for Apple’s suite of Internet services known as iTools (later re-branded as .Mac, then MobileMe, which is now known as iCloud) and included improved TCP/IP functionality with Open Transport 2.5.

Other features new to Mac OS 9 include:

Integrated support for multiple user accounts without using At Ease.

Support for voice login through VoicePrint passwords.

Keychain, a feature allowing users to save passwords and textual data encrypted in protected keychains.

A Software Update control panel for automatic download and installation of Apple system software updates.

A redesigned Sound control panel and support for USB audio.

Speakable Items 2.0, also known as PlainTalk, featuring improved speech synthesis and recognition along with AppleScript integration.

Improved font management through FontSync.

Remote Access Personal Server 3.5, including support for TCP/IP clients over Point-to-Point Protocol (PPP).

An updated version of AppleScript with support for TCP/IP.

Personal File Sharing over TCP/IP.

USB Printer Sharing, a control panel allowing certain USB printers to be shared across a TCP/IP network.

128-bit file encryption in the Finder.

Support for files larger than 2 GB.

Unix volume support.

CD Burning in the Finder (introduced in Mac OS 9.1).

Addition of a 'Window' menu to the Finder (introduced in Mac OS 9.1)

-Wikipedia

Mac OS 9.1

Mac OS 9.1 is the update for Mac OS 9.0.x users. It includes some stability to Finder, added Window menu, security enhancements, and more.

MacOS91CD.ZIP: Mac OS 9.1 Retail CD-ROM image.
MD5 Checksum: 232B183883D5ECD4952014D58CE2B85D
MacOS91CD_DE.ZIP: Mac OS 9.1 Retail CD-ROM image. (German)
MD5 Checksum: 7C9068B53853697AA8EAABFD9FF84CC6
MacOS91Updt_WW1.ZIP: Built CD image containing worldwide Mac OS 9.1 Update disk images in French-Universal, German, International English, Italian, Japanese, Spanish, and Swedish. Also included is the USA English. Not available separately, you have to download them all instead
MD5 Checksum: 5627D5F395F7FA50FB406E02F6FFB814
MacOS91Updt_WW2.ZIP: Built CD image containing worldwide Mac OS 9.1 Update disk images in Danish, Dutch, Finnish, Korean, Norwegian, Portuguese-Brazilian, Simplified Chinese, and Traditional Chinese. Not available separately, you have to download them all instead
MD5 Checksum: E46C572964465E21F0F747DA4799049D

Mac OS 9.1 Internal Edition CD-ROM

This is the Mac OS 9.1 CD-ROM special edition provided by Apple IS&T for internal use only. It includes the base Mac OS 9.1 installer with the guided way to install (such as unlocking disks, check drive using Norton Disk Doctor, etc.) as well some extra goodies that were exclusively available internally for Apple employers such as Apple software like Apple DVD Software 2.5.1 and QuickTime 5.0, several site licensed software such as Acrobat Reader 4.05a, Microsoft Office 2001, Norton Antivirus 7.0, and Norton Utilities 6.0, and other nice software.

CD-ROM Scan

MacOS91_Internal.ZIP: Mac OS 9.1 Internal Edition CD-ROM image.
MD5 Checksum: 5F73BB6E569A3D83681B0E38CEE0E330

Machine-Specific Installers

iBook G3 Series

The iBook G3/300 (Original/Clamshell), codenamed P1, features a 300 MHz PowerPC 750 (G3) processor, 32 MB or 64 MB of RAM, a 3.2 GB or 6.0 GB hard drive, and 2X AGP ATI Rage Mobility graphics with 4 MB of VRAM packed into a sleek handle-equipped "blueberry" or "tangerine" case with a 12.1" TFT active matrix display (800x600 native resolution).

The iBook G3/366 Special Edition (Original/Clamshell), features a 366 MHz PowerPC 750 (G3) processor, 64 MB of RAM, a 6.0 GB hard drive, and 2X AGP ATI Rage Mobility graphics with 4 MB of VRAM packed into a sleek handle-equipped "graphite and ice" case with a 12.1" TFT active matrix display (800x600 native resolution).

The iBook G3/366 (Firewire/Clamshell), features a 366 MHz PowerPC 750cx (G3) processor with a 256k "on chip" level 2 cache, 64 MB of RAM, a 10.0 GB hard drive, a 24X tray-loading CD-ROM drive, 2X AGP ATI Rage Mobility graphics with 8 MB of VRAM, and optional AirPort (802.11b) packed into a sleek handle-equipped conservative "indigo" or outlandish "key lime" case with a 12.1" TFT active matrix display (800x600 native resolution).

The iBook G3/466 Special Edition (Firewire/Clamshell), features a 466 MHz PowerPC 750cx (G3) processor with a 256k "on chip" level 2 cache, 64 MB of RAM, a 10.0 GB hard drive, a tray-loading 4X DVD-ROM drive, 2X AGP ATI Rage Mobility graphics with 8 MB of VRAM, and optional AirPort (802.11b) packed into a sleek handle-equipped conservative "graphite" or outlandish "key lime" case with a 12.1" TFT active matrix display (800x600 native resolution).

The iBook G3/500 (Dual USB - Translucent White), features a 500 MHz PowerPC 750cx (G3) processor with a 256k "on chip" level 2 cache, 64 MB or 128 MB of RAM, a 10.0 GB Ultra ATA hard drive, a tray-loading CD-ROM, DVD-ROM, CD-RW, or DVD-ROM/CD-RW "Combo" drive, 2X AGP ATI Rage Mobility 128 graphics with 8 MB of VRAM, and optional AirPort (802.11b) packed into a compact translucent white case with a 12.1" TFT XGA active matrix display (1024x768 native resolution).

-Everymac

This is the restore CD of iBook from Bob Kiwi, came with Mac OS 9.1 and other programs, all in one hard disk image, which to restore from it's original form and contains bundled software like iMovie 2.0.3, AppleWorks 6, iTunes, FAXstf, Adobe Reader, and more. This will work for any iBook computers.
Restore disk image contains Mac OS 9.1 with Mac OS ROM 7.8.1, Adobe Acrobat Reader 4.0.5, Apple DVD Player 2.6, Apple File Security 2.2, Apple Verifier 2.2, AppleWorks 6.0.4, EarthLink TotalAccess 2.1.7, FAXstf 6.0.6, Graphing Calculator 1.2, iMovie 2.0.3, Internet Explorer 5.0, iTunes 1.1, Netscape Communicator 4.75, Network Browser 2.0, Outlook Express 5.02, Palm Desktop 2.6, QuickTime 4.1.2 folder, Sherlock 2 v3.0.3, SimpleText 1.4, Internet Access 1.5.2, and other extras.

iBookG391CD_Rest.ZIP: iBook G3 Series restoration CD-ROM v1.1 image. (Mac OS 9.1)
MD5 Checksum: CE07B1AC5E8BEFA689E03192BF466F10
iBookG391CDDE_Inst.ZIP: iBook G3 Series installation CD-ROM image. (Mac OS 9.1 German)
MD5 Checksum: 620066B4ABD13E7C92750F584C4D85EE
iBookG391CD_Apps.ZIP: iBook G3 Series applications CD-ROM image.
MD5 Checksum: 3202C302459426E45A2A0167B8E90B02

iMac Summer 2000 DV Series

The Apple iMac G3/400 DV (Summer 2000 - Indigo/Ruby) features a 400 MHz PowerPC 750 (G3) processor, 512k backside level 2 cache, 64 MB of RAM, a 10.0 GB Ultra ATA hard drive, a slot loading 24X CD-ROM drive, ATI Rage 128 Pro (AGP 2X) graphics with 8 MB of VRAM, a Harmon-Kardon designed sound system, and Firewire "400" ports packed into a translucent "indigo" or "ruby" (pictured) all-in-one case design with a 15-inch CRT display.

The Apple iMac G3/450 DV+ (Summer 2000) features a 450 MHz PowerPC 750 (G3) processor, 512k backside level 2 cache, 64 MB of RAM, a 20.0 GB Ultra ATA hard drive, a slot loading 4X DVD-ROM drive, ATI Rage 128 Pro (AGP 2X) graphics with 8 MB of VRAM, a Harmon-Kardon designed sound system, and Firewire "400" ports packed into a translucent "indigo", "ruby", or "sage" (pictured) all-in-one case design with a 15-inch CRT display.

The Apple iMac G3/500 DV Special Edition (Summer 2000) features a 500 MHz PowerPC 750 (G3) processor, 512k backside level 2 cache, 128 MB of RAM, a 30.0 GB Ultra ATA hard drive, a slot loading 4X DVD-ROM drive, ATI Rage 128 Pro (AGP 2X) graphics with 8 MB of VRAM, a Harmon-Kardon designed sound system, and Firewire "400" ports packed into a translucent "graphite" or "snow" all-in-one case design with a 15-inch CRT display.

-Everymac

This is the install CD of iMac Summer 2000 DV. It includes the Mac OS 9.1 with Mac OS ROM 7.5.1 installer and some application installers like AppleWorks 6 and iTunes.

iMacS200091CD_Inst.ZIP: iMac G3 Summer 2000 DV installation CD-ROM v1.2 image. (Mac OS 9.1)
MD5 Checksum: 2A260DABF3845A862C479FC1BD632265

iMac Early 2001 Series

The Apple iMac G3/400 (Early2001 - Indigo) -- for all intents and purposes a re-issue of the "Indigo" configuration of the iMac G3/400 DV (Summer 2000 - Indigo/Ruby) -- features a 400 MHz PowerPC 750 (G3) processor, 512k backside level 2 cache, 64 MB of RAM, a 10.0 GB Ultra ATA hard drive, a slot loading 24X CD-ROM drive, ATI Rage 128 Pro (AGP 2X) graphics with 8 MB of VRAM, a Harmon-Kardon designed sound system, and Firewire "400" ports packed into a translucent "indigo" all-in-one case design with a 15-inch CRT display.

The Apple iMac G3/500 (Early 2001 - Indigo/Flower Power/Blue Dalmation) features a 500 MHz PowerPC 750cx (G3) processor with a 256k on-chip level 2 cache, 64 MB of RAM, a 20.0 GB Ultra ATA hard drive, a slot loading 8X/4X/24X CD-RW drive, ATI Rage 128 Ultra (AGP 2X) graphics with 16 MB of VRAM, a Harmon-Kardon designed sound system, and Firewire "400" ports packed into a translucent "indigo", "flower power", or "blue dalmation" (pictured) all-in-one case design with a 15-inch CRT display.

The Apple iMac G3/600 Special Edition (Early 2001) features a 600 MHz PowerPC 750cx (G3) processor with a 256k on-chip level 2 cache, 128 MB of RAM, a 40.0 GB Ultra ATA hard drive, a slot loading 8X/4X/24X CD-RW drive, ATI Rage 128 Ultra (AGP 2X) graphics with 16 MB of VRAM, a Harmon-Kardon designed sound system, and Firewire "400" ports packed into a translucent "graphite", "flower power" (pictured), or "blue dalmation" all-in-one case design with a 15-inch CRT display.

-Everymac

Install & Restore CDs of Mac OS 9.1 for iMac G3 Early 2001 Series (Indigo/Flower Power/Blue Dalmation).
Restore disk image (from iMacE200191CD_Rest.ZIP) contains Mac OS 9.1 with Mac OS ROM 7.5.1, Adobe Acrobat Reader 4.0.5, Apple File Security 2.2, Apple Verifier 2.2, AppleWorks 6.0.4, EarthLink TotalAccess 2.1.7, FAXstf 6.0.6, Graphing Calculator 1.2, iMovie 2.0.3, Internet Explorer 5.0, iTunes 1.0.1, Netscape Communicator 4.75, Network Browser 2.0, Outlook Express 5.02, Palm Desktop 2.6, Quicken 2001 Deluxe 10.0.1, QuickTime 4.1.2 folder, Sherlock 2 v3.0.2, SimpleText 1.4, Internet Access 1.5.2, and other extras.

Restore disk image (from iMacE200191CDv11_Rest1.ZIP) contains Classic Mac OS volume (Mac OS 9.1 with Mac OS ROM 7.5.1, Adobe Acrobat Reader 4.0.5, Apple File Security 2.2, Apple Verifier 2.2, AppleWorks 6.0.4, Bugdom 1.1.4, Cro-Mag Rally 1.0.6, EarthLink TotalAccess 2.1.7, FAXstf 6.0.6, Graphing Calculator 1.2, iMovie 2.0.3, Internet Explorer 5.0, iTunes 1.0.1, Nanosaur 1.3.4a, Netscape Communicator 4.75, Network Browser 2.0, Outlook Express 5.02, Palm Desktop 2.6, Quicken 2001 Deluxe 10.0.1, QuickTime 4.1.2 folder, Sherlock 2 v3.0.2, SimpleText 1.4, Internet Access 1.5.2, and other extras) and Mac OS X volume (Mac OS X 10.0.3, Address Book 1.0, AppleScript 1.6, Calculator, Chess 1.1, Clock 1.0, Dock Extras, Image Capture 1.0, iMovie 2.1, Internet Connect 1.0, Internet Explorer 5.1, iTunes 1.1.1, Mail 1.0, Preview 1.0, QuickTime Player 5.0, Sherlock 3.1, Stickies 2.0, System Preferences 1.0, TextEdit 1.0, and other extras).

iMacE200191CD_Inst.ZIP: iMac G3 Early 2001 installation CD-ROM image. (Mac OS 9.1)
MD5 Checksum: 4AD75ED58386F802C90F9411100E4F69
iMacE200191CD_Rest.ZIP: iMac G3 Early 2001 restoration CD-ROM image. (Mac OS 9.1)
MD5 Checksum: 345154E169A6F6E17457B599E2966C22
iMacE200191CDDE_Inst.ZIP: iMac G3 Early 2001 installation CD-ROM image. (Mac OS 9.1 German)
MD5 Checksum: BD839AE3F50449C2A10E234C11F4AA43
iMacE200191CDv13_Inst.ZIP: iMac G3 Early 2001 installation CD-ROM v1.3 image. (Mac OS 9.1)
MD5 Checksum: 9DBDE06D9B9C45F22F0E5B0CD0A7533F
iMacE200191CDv11_Rest1.ZIP: iMac G3 Early 2001 restoration CD-ROM Disc 1 v1.1 image. (Mac OS 9.1 + Mac OS X 10.0.3)
MD5 Checksum: 96654F397BB4674F263FE37687176C40
iMacE200191CDv11_Rest2.ZIP: iMac G3 Early 2001 restoration CD-ROM Disc 2 v1.1 image. (Mac OS 9.1 + Mac OS X 10.0.3)
MD5 Checksum: 5AA7DFE7331C78E7781F9E57485B6BA5
iMacE200191CDv11_Rest3.ZIP: iMac G3 Early 2001 restoration CD-ROM Disc 3 v1.1 image. (Mac OS 9.1 + Mac OS X 10.0.3)
MD5 Checksum: 88D003E1ED7A10AAFDC1F4E329020CC5
iMacE200191CDv11_Rest4.ZIP: iMac G3 Early 2001 restoration CD-ROM Disc 4 v1.1 image. (Mac OS 9.1 + Mac OS X 10.0.3)
MD5 Checksum: ABFCFC5D225D138623E1B8E63B3554FC
iMacE200191CDv11_Apps.ZIP: iMac G3 Early 2001 applications CD-ROM v1.1 image.
MD5 Checksum: 6D76C098623F97A5489AE703A8A705D3

Power Mac G4 Digital Audio

The Apple Power Macintosh G4/466 (Digital Audio) features a 466 MHz PowerPC 7410 (G4) processor with the AltiVec "Velocity Engine" vector processing unit and 1 MB of backside cache. It shipped configured with 128 MB of RAM, a 30 GB Ultra ATA/66 hard drive, an 8X CD-RW drive, and a 4X AGP ATI Rage 128 Pro graphics card with 16 MB of SDRAM. AirPort (802.11b) was available by custom configuration.

By default, the Apple Power Macintosh G4/533 (Digital Audio) features a 533 MHz PowerPC 7410 (G4) processor with the AltiVec "Velocity Engine" vector processing unit and 1 MB of backside cache. It shipped configured with 128 MB of RAM, a 40 GB Ultra ATA/66 hard drive, an 8X CD-RW drive, and a 4X AGP NVIDIA GeForce 2 MX graphics card with 32 MB of SDRAM. AirPort (802.11b) was available by custom configuration.

The Apple Power Macintosh G4/667 (Digital Audio) features a 667 MHz PowerPC 7450 (G4) processor with the AltiVec "Velocity Engine" vector processing unit, 256k "on chip" level 2 cache, and 1 MB of level 3 backside cache. It shipped configured with 256 MB of RAM, a 60 GB Ultra ATA/66 hard drive, an 8X CD-RW drive, and a 4X AGP NVIDIA GeForce 2 MX graphics card with 32 MB of SDRAM. AirPort (802.11b) was available by custom configuration.

-Everymac

Install & Restore CDs of Mac OS 9.1 for Power Macintosh G4 Digital Audio.
Restore disk image (from PMG4DA91CD_Rest.ZIP) contains Mac OS 9.1 with Mac OS ROM 7.5.1, Adobe Acrobat Reader 4.0.5, Apple DVD Player 2.5, Apple File Security 2.2, Apple Verifier 2.2, EarthLink TotalAccess 2.1.7, FAXstf 6.0.6, Graphing Calculator 1.2, iMovie 2.0.3, Internet Explorer 5.0, iTunes 1.0.1, Netscape Communicator 4.75, Network Browser 2.0, Outlook Express 5.02, Palm Desktop 2.6, QuickTime 4.1.2 folder, Sherlock 2 v3.0.2, SimpleText 1.4, Internet Access 1.5.2, and other extras.

Restore disk image (from PMG4DA91CDDE_Rest.ZIP) contains Mac OS D-9.1 with Mac OS ROM 6.7.1, Adobe Acrobat Reader 4.0.5a, Apple DVD Player 2.5, AppleCD Audio Player 2.5.2, Apple File Security 2.2, Apple Verifier 2.2, Graphing Calculator 1.0, iMovie 2.0, Internet Explorer 5.0, Netscape Communicator 4.5, Network Browser 2.0, Outlook Express 5.02, Palm Desktop 2.6, QuickTime 4.1.2 folder, Sherlock 2 v3.0.2, SimpleText 1.4, Internet Access 1.5.1, and other extras.

German Restore CD-ROM Scan

PMG4DA91CD_Inst.ZIP: Power Mac G4 Digital Audio installation CD-ROM v1.2 image. (Mac OS 9.1)
MD5 Checksum: 9D9176E02AB99C9FC6BDE484595929FD
PMG4DA91CD_Rest.ZIP: Power Mac G4 Digital Audio restoration CD-ROM v1.2 image. (Mac OS 9.1)
MD5 Checksum: 323F98034AAB0E5A29BDBB9EE35BF422
PMG4DA91CDDE_Rest.ZIP: Power Mac G4 Digital Audio restoration CD-ROM v1.0.1 image. (Mac OS 9.1 German)
MD5 Checksum: B597110624B4B9D1802259F829824051

Mac OS 9.1 and later could not boot successfully on SheepShaver because it lacks memory management unit (MMU). However, there are some ways to get 9.1 working on SheepShaver by hacking the System file or replacing System file from Mac OS 9.0.4 and changing version number to 9.1 using ResEdit
, but this may result system instability.
If you are running PowerBook 3400c, use the update without updating hard disk drivers.
For PowerBook 1400s, Password Security is not supported.
For 20th Anniversary Mac, disable Virtual Memory.
For Power Macintosh 6100/7100/8100, you need to install from the CD version, updating from 9.0.x is not supported.
Also, for PowerMac 61/71/8100/9150 with a third-party accelerator card will not install Mac OS 9.1.

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