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Apple Macintosh system software

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A Macintosh System Tools disk, relabelled by hand for System 4.1 and Finder 5.5 (photo Nikopol-h, CC0)

Apple Macintosh system software is the operating system Apple supplied with every 68000-series and early PowerPC Macintosh, called System up to version 7.5.5 and Mac OS from 7.6.[1] Until System 7.1, Apple released a new system version when new hardware needed one; from 7.1 a new model instead came with a small model-specific file, the System Enabler, that let the existing version run it.[2][3] Every machine therefore has an oldest version that will start it and a newest version Apple supported on it. Apple's installation images survive in an archived copy of its software update server.

Which version a machine needs

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The version each model shipped with

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Each version up to 7.5.3 was released for particular machines. A machine generally needs at least the version it was released with.

System versions and the machines they were released for[2]
Version Released for, or main change
6.0.1 Macintosh IIx (1988)
6.0.3 Macintosh IIcx (1989)
6.0.4 Macintosh Portable and IIci (1989)
6.0.5 Macintosh IIfx (1990)
6.0.7 Macintosh LC, IIsi and Classic (1990); 6.0.6 was intended for them but never officially released
6.0.8 New printing software matching System 7; otherwise the same as 6.0.7
7.0 TrueType, File Sharing
7.0.1 Quadra 700 and 900, PowerBook 100, 140 and 170 (1991)
7.1 Fonts folder, System Enablers, WorldScript
7.1.1 (System 7 Pro) AppleScript, PowerTalk; a subset was released for the PowerBook Duo 250, 270c and 280 and the PowerBook 520, 520c, 540 and 540c
7.1.2 Power Macintosh 6100, 7100 and 8100 (1994)
7.1.2P Performa, LC and Quadra 630 (1994)
7.5 QuickDraw GX and other additions
7.5.1 System 7.5 Update 1.0 (1995)
7.5.2 Power Macintosh 7200, 7500, 8500 and 9500, with the first Open Transport (1995)
7.5.3 System 7.5 Update 2.0, System 7.5.3 Revision 2 and the full System 7.5 Version 7.5.3 (1996)

Versions with a P suffix (7.0.1P, 7.1P to 7.1P6, 7.1.2P) are the Performa editions.[2] Apple describes 6.0.8 as identical to 6.0.7 apart from the System 7 printing software, so that System 6 and System 7 machines could share a LaserWriter.[4]

Oldest version that will run

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  • Apple's position was that System 6.0 and later were not designed, tested or recommended for any Macintosh before the Plus, whatever memory is fitted; the Plus and later machines have 256 bytes of PRAM, which Apple named as a major part of the problem.[5] Apple described System 6.0.7 as running on every model from the Plus to the IIfx, needing only 1 MB of RAM and 800K drives.[6]
  • System 7.0 and 7.0.1 run on the Plus and later with 2 MB of RAM (4 MB recommended) and a hard disk. Virtual memory needs a 68030, or a 68020 with a PMMU. Apple told users of 7.0 and 7.0.1 to install System 7 Tune-Up 1.1.1, last of all.[7]
  • Machines released after System 7.1 need 7.1 or later, usually with an enabler, and do not operate properly with 7.0.1 or anything earlier.[1]
  • System 7.5.3 needs at least 4 MB of RAM.[8]

Some late machines also refuse versions older than the one they shipped with, and some skip a version:[9][10]

  • Power Macintosh 4400/200: shipped with 7.5.3 and needs the enabler that came with it. It does not support Mac OS 7.6 but does support 7.6.1.
  • Power Macintosh 5500, 6500, 7300, 8600/200 and 9600/200 and /233: shipped with 7.5.5 and need the enabler that came with it. They do not support 7.6 but do support 7.6.1.
  • Power Macintosh 8600/250 and /300 and 9600/300 and /350: shipped with 7.6.1, need no enabler, and do not run 7.5.5 or 7.6. They run Mac OS 8.
  • PowerBook 3400: not supported under 7.5.3 or 7.5.5; it needs 7.6 or later.

Newest version Apple supported

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  • System 7.5.5 is the last version for the Plus, SE, SE/30, Classic, II, IIx, IIcx, LC, Portable and PowerBook 100.[9]
  • Mac OS 7.6 and 7.6.1 need a PowerPC processor, a 68040, or a "32-bit clean" 68030, and at least 8 MB of RAM. Apple names the SE/30, IIx and IIcx as the 68030 machines that are not 32-bit clean.[11] Mac OS 8 needs a 68040, so 7.6.1 is the newest version for 68030 machines such as the IIci, IIsi, IIvx, Classic II, LC II, LC III, Color Classic and the 68030 PowerBooks.[9][12] Apple's own tables disagree on the IIfx: the 7.5.3-and-later matrix marks it unsupported under 7.6 and 7.6.1, while the earlier 7.1-to-7.6 table marks 7.6 as working.[9][1]
  • Mac OS 8.0 and 8.1 need a 68040 or PowerPC processor and 12 MB of RAM.[12] Mac OS 8.1 is the last version for the Centris, Quadra and LC 475, 575 and 580.[13]
  • Mac OS 8.5 and later need a PowerPC Macintosh. Apple listed the iMac, the Power Macintosh G3 and any Power Macintosh, PowerBook or Workgroup Server with a four-digit model number. The Power Macintosh Upgrade Card in a Quadra 700 and the Macintosh Processor Upgrade in an LC 575 are not supported.[14]

The full per-model tables are Apple's Tech Info Library articles 8970 (System 7.1 to Mac OS 7.6) and 21176 (7.5.3 and later).[1][9]

System Enablers

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A System Enabler is a model-specific file that overrides resources in the System file at startup so that an existing system version can run a Macintosh released after it. Apple introduced them with System 7.1, whose System file already supports every model from the Plus to the Quadra 950 and PowerBook 145. Early documentation called them "gibblies".[3] Apple folded support for every model released before System 7.5 into a universal enabler that shipped with 7.5. Its enabler article states that the computers it lists need no enabler with 7.5.3 and later, and its own notes then make exceptions for machines released after 7.5.3.[10]

These models need no enabler with any version: Plus, SE, SE/30, Classic, Classic II, LC, LC II, LC 580, II, IIx, IIcx, IIsi, IIci, IIfx, Portable, PowerBook 100, 140, 145, 145B and 170, Quadra 700, 900 and 950, and Performa 200, 400, 405, 410, 430, 580, 640 and 6110 series.[1][10]

Enablers by model, with the last version Apple released[10][1][9]
Enabler Models Last version Not needed from
System Enabler 001 IIvi, IIvx; Performa 600 with Macintosh (non-Performa) System 7.1 1.0.1 7.5
System Enabler 003 LC III 1.1 7.5
System Enabler 040 Centris 610 and 650, Quadra 610, 650 and 800 1.1 7.5
System Enabler 065 LC 475, LC 575, Quadra 605 1.2 7.5
System Enabler 088 Centris 660AV, Quadra 660AV and 840AV 1.2 7.5
System Enabler 131 PowerBook 160, 165, 165c, 180 and 180c (replaces enablers 111 and 121) 1.0.3 7.5
System Enabler 304 Performa 600 with Performa system 7.1P 1.0.1 7.5
System Enabler 308 Performa 450, 460, 466 and 467 1.0 7.5
System Enabler 332 Performa 550 and 560 1.1 7.5
System Enabler 364 Performa 475, 476, 575, 577 and 578 1.1 7.5
System Enabler 401 Color Classic 1.0.5 7.5
System Enabler 403 LC 520, LC 550 1.0.2 7.5
System Enabler 404 Macintosh TV 1.0 7.5
System Enabler 405 LC 630, Quadra 630, Performa 630 to 638 1.0 7.5
System Enabler 406 Power Macintosh 5200/75 LC and 5300/100 LC, Performa 5200, 5300, 6200 and 6300 1.0 7.5.3
System Enabler 410 Power Macintosh 5400 and 6400, Performa 6400 1.1 7.5.5
System Enabler 411 Power Macintosh 5500/225, 6500/225 and 6500/250 – 7.6.1
System Enabler 701 Power Macintosh 7200, 7500, 8500 and 9500 1.1 (7200, 9500), 1.2 (7500, 8500) 7.5.3
System Enabler 702 Power Macintosh 7300, 8600/200, 9600/200, 200MP and 233 – 7.6.1
System Enabler 827 Power Macintosh 4400/200 – 7.6.1
PowerPC Enabler Power Macintosh 6100, 7100 and 8100 1.0.2; 1.1.1 for the 6100/66, 7100/80, 8100/100 and 8100/110 7.5 (first models), 7.5.3 (later models)
PowerPC Upgrade Card Enabler Macintoshes with the Power Macintosh Upgrade Card 1.0.1 7.5
PowerBook 150 Enabler PowerBook 150 1.1 7.5
PowerBook 500 Series Enabler PowerBook 520, 520c, 540 and 540c 1.0.2 7.5
PowerBook Duo Enabler PowerBook Duo 210, 230, 250, 270c, 280 and 280c (2.0 needed for the 280 and 280c) 2.0 7.5
PowerBook 5300/2300/190 Enabler PowerBook 190, 5300, Duo 2300 1.2.4 7.5.3
PowerBook 1400 Enabler PowerBook 1400 – 7.6

"Not needed from" is the first version that Apple's compatibility tables show running the model without an enabler.[1][9][10] A dash means Apple's tables give no version number for the enabler.

Fitting and handling enablers

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  1. Keep the enabler at the top level of the System Folder, not in the Extensions folder.[3]
  2. If more than one enabler is present, the system chooses the one that matches the machine; the others are ignored.[3] After an Easy Install of 7.5 over 7.1, the PowerBook 150, PowerBook 500 Series and Workgroup Server 9150 enablers may be left behind. System 7.5 ignores them and they can be deleted.[15]
  3. On a Power Macintosh, do not drag the enabler from the Disk Tools disk onto the hard disk. Apple notes that the enabler on that disk, like its System and Finder, is not a complete copy; install it with the Installer.[16]
  4. Do not add, remove or replace files on an Install Me First disk. Its installer script checks each file's version and dates as well as its name, and aborts if anything differs.[17]
  5. The enabler's file name is locked. To rename one, duplicate it, rename the copy and remove the original; Apple advises keeping the original name.[18]

Models released after 7.1 came with an "Install Me First" disk holding their enabler, packed with the System 7.1 installation disks.[19] A startup floppy made on another model needs the right enabler in its System Folder before it will run a machine that requires one with that system version. Apple gives the same advice for A/UX installation floppies (see A/UX).[1][20]

Apple's own installation images

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Apple distributed system software, enablers and updates free on its software update servers: download.info.apple.com and ftp.info.apple.com in Austin, and ftp.apple.com in Cupertino.[21] A copy of download.info.apple.com taken in November 2012 is on archive.org as the item download.info.apple.com.2012.11. Its description records that Apple later discarded the site. The files can be browsed inside the zip without downloading all 8 GB.[22] The Macintosh files are under Apple_Support_Area/Apple_Software_Updates/English-North_American/Macintosh/.

What the archived Apple server holds for vintage Macintoshes[22]
Folder Contents
System/Older_System/System_6.0.x System 6.0.3 and 6.0.5 as four disks each; System 6.0.8 as four 800K disks or two 1.4 MB disks; TrueType 1.0 for System 6
System/Older_System/System_7.0.x System 7.0 and 7.0.1 as single self-mounting images; System 7 Tune-Up 1.1.1
System/Older_System/For_System_7.1.x System Update 3.0 on 800K or 1.4 MB disk; Compatibility Checker 2.0
System/Older_System/System_Enablers Enablers 001, 003, 040, 065, 088, 131, 401, 403, 404, 405 and 406; PowerBook 150, PowerBook 500 Series and PowerBook Duo (1.0 and 2.0) enablers; PowerPC Enabler 1.0.2 and 1.1.1; PPC Upgrade Enabler 1.0.1
System/Older_System/System_7.5_Version_7.5.3 The complete System 7.5.3 as a self-mounting image in 19 parts
System/Older_System/For_System_7.5.2_and_7.5.3 System 7.5.3 Revision 2
System/System_7.5_Update_2.0, System_7.5.5_Update, Mac_OS_7.6.1_Update, Mac_OS_8.1_Update Updaters for System 7.5 (Update 2.0), 7.5.5, Mac OS 7.6.1 and Mac OS 8.1, split into parts; the 8.1 folder also has a PowerPC Disk Tools image
Utilities Disk First Aid, Drive Setup (1.0.5 to 1.7.3) and Apple HD SC Setup 7.3.5
Display-Peripheral/Video Apple Video Player 1.7.2

Apple released System 7.5.3 as a free download on 30 January 1999. Its self-mounting images need System 7.0.1 or later to open; on an older system, start the Macintosh from the System 7.5 Network Access floppy first.[8][23] Apple's 1988 Macintosh System Software User's Guide is hosted here as Macintosh System Software Users Guide 1988.

A/UX

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The A/UX Finder with the root file system (/) and a volume named A/UX CDInstall mounted (screenshot Nikopol-h, CC0)

A/UX is Apple's Unix for 68020, 68030 and 68040 Macintoshes. Version 3.0 is based on AT&T System V.2.2 Unix with BSD 4.2 and 4.3 extensions, conforms to SVID and supports System V.3 Streams.[24] Apple announced A/UX 1.0 in February 1988 and ended the line in 1995 with 3.1.1.[25] The Finder in A/UX 3.0.1, 3.0.2 and 3.1 is based on System 7.0.1.[20] Apple's compatibility table notes that the Apple Workgroup Server 95 uses A/UX.[1]

Machines that run A/UX

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A/UX needs a paged memory management unit (PMMU) and a floating-point unit (FPU).[26][20] Apple's list for A/UX 3.0.1 and 3.0.2:[20]

A/UX 3.0.1 and 3.0.2 support by model[20]
Supported Not supported
Macintosh SE/30; Macintosh II (with a PMMU fitted), IIx, IIcx, IIci, IIfx, IIsi (with an FPU, per the installation guide[26]); Centris 610 only with a third-party FPU; Centris 650 only with an FPU; Quadra 610 (not 68LC040 models), 650, 700, 800, 900 and 950; Apple Workgroup Server 95 IIvx; Quadra 630, 660AV and 840AV; every LC (no FPU); every PowerBook and PowerBook Duo; every Power Macintosh

The low-end Quadra 610 (8/160) and the Quadra 610 DOS Compatible have a 68LC040 with no FPU and will not run A/UX.[20] Apple supported A/UX 3.1 only on the Workgroup Server 95, though owners of other machines could buy it as an upgrade.[20] To install on a supported machine that needs an enabler, copy the enabler into the System Folder of the A/UX installation floppy before starting.[20]

Installing A/UX 3.0

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Apple's A/UX Installation Guide for 3.0 lists what is needed:[26]

  • at least 8 MB of RAM;
  • a SCSI hard disk of at least 80 MB, with 160 MB recommended (one drive or two 80 MB drives). A working system fits on 80 MB but leaves almost no room for user files;
  • a SCSI CD-ROM drive and the A/UX 3.0 CD-ROM;
  • the A/UX Installer Startup disk, which comes in two versions that are not interchangeable: an 800K disk for the SE/30 and the Macintosh II family, and a 1.4 MB disk for the Quadras.

Apple's guide also says to disconnect SCSI devices not needed for the installation and move the terminator to the last device left on the chain.[26] Apple's memory article for 3.0 gives the same 8 MB and 80 MB minimums.[27]

A/UX 3.0 installer messages and what they mean[26]
Message or symptom Cause Action
"This is not a Macintosh disk" or "This disk is unreadable" at the Installer Startup disk Wrong version of the disk for the machine, or a damaged disk Use the 800K disk on the SE/30 and II family, the 1.4 MB disk on a Quadra
No PMMU Original Macintosh II without a PMMU Fit a PMMU
No FPU IIsi without an FPU Fit an FPU
"I'm sorry, but this machine has only x megabytes of memory" Less than 8 MB of RAM Fit at least 8 MB
"I'm sorry, but I can't find a volume which looks like an installation CD" CD not inserted, drive off or badly connected, SCSI ID clash, wrong startup disk, or a drive the installer's CD driver does not support Check the CD, power, cabling and SCSI ID; use the right Installer Startup disk
"Panic: rootmount: cannot mount root" Fault on the A/UX CD-ROM Use a good copy of the CD
"has an invalid partition map or may be unformatted" Disk not initialised or partitioned for A/UX Custom, then Disk Setup, which runs Apple HD SC Setup; initialise and repartition
"Filesystem mount error" No A/UX file system on the disk, or a damaged one Prepare the disk with the HD SC Setup supplied with the A/UX 3.0 CD (third-party utilities and other versions cannot). If the disk holds data, stop the installer with Command-period and run fsck -y /dev/dsk/cXd0s0, where X is the SCSI ID
Hard disk not listed by the installer Disk switched on after the installer started Switch the disk on and restart from the Installer Startup disk
Blinking question mark after installation Disk not connected or SCSI ID clash, or the Install A/UX Startup step of a custom install was skipped Check the drive; run Custom, then Install A/UX Startup

Images of A/UX installation media are on archive.org, including the A/UX 2.0 installation CD (Apple part 689-0049-A) in item Macintosh_A_UX_2.0_Installation_Disc, the 3.0.1 CD and boot floppy in aux-3.0.1-install, and the 3.1 update CD in apple-aux-3.1-update.[28] Apple's A/UX 1.0, 2.0 and 3.0 manuals are on bitsavers under pdf/apple/mac/a_ux.[29]

Apple Video Player

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Apple Video Player is Apple's application for watching and capturing video on Macintoshes fitted with the Apple Video System, the Apple TV/Video System, the Apple TV/FM Radio System or the Apple MPEG Media System. It stores a description for each TV channel, handles NTSC, PAL and SECAM, and captures still frames and QuickTime movies.[30] Apple preinstalled it on machines that did not have the hardware, such as the Performa 6360 and 6400, where it reports the video hardware missing until an Apple Video System card is fitted.[31]

The application works with an extension, Video Startup, and the two must be the same version. A mismatch gives "Apple Video Player requires the Video Startup Extension to be installed" even when the extension is present,[32] and a mismatched or outdated pair can report the TV tuner as missing when it is fitted. The usual cause is installing version 1.3.2 from the TV/Video System floppies onto a system that already has a newer version.[33]

Apple Video Software version for each system version[33]
System Apple Video Software
7.5.3 1.4
7.6 1.4.2
Mac OS 8 1.6.3 (1.7 on Power Macintosh G3s with Mac OS 8 preinstalled)
Mac OS 8.1 1.7.1
Mac OS 8.6 1.7.3

Version 1.7.2, released on 3 August 1998, needs QuickTime 2.0 or later and System 7, and fixes a freeze-frame fault with QuickTime 3. It is in the Display-Peripheral/Video folder of the archived Apple server.[30][22]

Other points from Apple's notes:

  • Mac OS 8 installs Apple Video Player and Apple FM Radio in the Applications folder, where earlier systems used Apple Extras. After an upgrade the aliases in Apple Menu Items can still point at the old copies, which then refuse to run. Delete those aliases and make new ones from the Applications folder.[34]
  • A forgotten password is cleared by quitting the application and deleting the Apple Video Player Prefs file from the Preferences folder.[30]
  • Video is captured at up to 640 by 480. For clean captures turn virtual memory off and avoid printing or network activity. Movies record at the current volume, so a muted recording has no sound.[30]
  • The Apple Video Player Guide help file needs System 7.5 or later.[35]
  • Apple Video Player is not meant for recording DV video over FireWire; the result stutters and has no sound.[36]

The user manuals for the video and TV systems, which each have a chapter on Apple Video Player, are on Apple Video and TV Systems Documentation.

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References

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  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Apple Computer, Tech Info Library article 8970, "System 7.1 through Mac OS 7.6: Compatibility With Macintosh Computers", savagetaylor.com mirror (retrieved 2026-10-04). Per-model support for 7.1 to 7.6 and the enabler for each model.
  2. ↑ 2.0 2.1 2.2 Apple Computer, Tech Info Library article 15582, "Macintosh: System Software Version History", savagetaylor.com mirror (retrieved 2026-10-04). Version table through 7.5.3 and the machine or change each release was made for.
  3. ↑ 3.0 3.1 3.2 3.3 Apple Computer, Tech Info Library article 10815, "System 7.1: System Enablers Described (7/93)", created 12 October 1992, savagetaylor.com mirror (retrieved 2026-10-04). Adapted from develop issue 14.
  4. ↑ Apple Computer, System 6.0.8 Information (SSW_6.0.8_Info.txt, copyright 1991), in the folder Macintosh/System/Older_System/System_6.0.x of Apple's software update server; archived copy in archive.org item download.info.apple.com.2012.11. 6.0.8 is 6.0.7 configured with the System 7 printing software; no new features or bug fixes.
  5. ↑ Apple Computer, Tech Info Library article 4457, "System 6.0.X: Not Compatible with Macintosh 512Ke", savagetaylor.com mirror (retrieved 2026-10-04).
  6. ↑ Apple Computer, Tech Info Library article 8627, "System 6.0.7: Compatible With Entire Macintosh Family", savagetaylor.com mirror (retrieved 2026-10-04).
  7. ↑ Apple Computer, Tech Info Library article 14033, "System 7.0 or 7.0.1: Installation Requirements", savagetaylor.com mirror (retrieved 2026-10-04). Hardware and RAM requirements; disk sets (eight 800K or six 1.4 MB disks); clean install procedure; Tune-Up 1.1.1.
  8. ↑ 8.0 8.1 Apple Computer, Tech Info Library article 58265, "System 7.5 Version 7.5.3: Available for Download", savagetaylor.com mirror (retrieved 2026-10-04). Free download released 30 January 1999; 4 MB minimum; self-mounting images need System 7.0.1 or later.
  9. ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 Apple Computer, Tech Info Library article 21176, "System 7: 7.5.3 and Later Enabler Matrix", created 17 April 1997, modified 19 October 2000, savagetaylor.com mirror (retrieved 2026-10-04). Per-model support for 7.5.3, 7.5.5, 7.6 and 7.6.1; enablers needed with 7.5.3 and later.
  10. ↑ 10.0 10.1 10.2 10.3 10.4 Apple Computer, Tech Info Library article 11491, "System Enablers: Current Versions & Change History", created 4 February 1993, modified 20 October 2000, savagetaylor.com mirror (retrieved 2026-10-04). Current version of each enabler, the models it supports, notes on when it is no longer needed, and change history.
  11. ↑ Apple Computer, Tech Info Library article 21106, "Mac OS 7.6: System Requirements", savagetaylor.com mirror (retrieved 2026-10-04). Processor and 8 MB RAM requirement; disk space 40 to 120 MB.
  12. ↑ 12.0 12.1 Apple Computer, Tech Info Library article 30363, "Mac OS 8.1: System Requirements and CPU Compatibility", savagetaylor.com mirror (retrieved 2026-10-04).
  13. ↑ Apple Computer, Tech Info Library article 25114, "Mac OS 8, 9: Compatibility With Macintosh Computers", savagetaylor.com mirror (retrieved 2026-10-04).
  14. ↑ Apple Computer, Tech Info Library article 58073, "Mac OS 8.5: System Requirements for Install and Use", savagetaylor.com mirror (retrieved 2026-10-04). PowerPC only; 150 to 250 MB disk; 16 MB RAM with virtual memory at 24 MB.
  15. ↑ Apple Computer, Tech Info Library article 16120, "System 7.5: Old Enablers May Remain After Easy Install (2/95)", savagetaylor.com mirror (retrieved 2026-10-04).
  16. ↑ Apple Computer, Tech Info Library article 15041, "Power Macintosh: Don't Drag Copy System Enabler (2/95)", savagetaylor.com mirror (retrieved 2026-10-04).
  17. ↑ Apple Computer, Tech Info Library article 11764, "PowerBook 160, 180: System Enablers on Install Me First (3/93)", created 17 March 1993, savagetaylor.com mirror (retrieved 2026-10-04).
  18. ↑ Apple Computer, Tech Info Library article 15765, "System 7: Renaming System Enablers", savagetaylor.com mirror (retrieved 2026-10-04).
  19. ↑ Apple Computer, Tech Info Library article 10655, "System Software: Install Me First Disk and System Enablers", created 2 September 1992, savagetaylor.com mirror (retrieved 2026-10-04).
  20. ↑ 20.0 20.1 20.2 20.3 20.4 20.5 20.6 20.7 Apple Computer, Tech Info Library article 14662, "A/UX and Compatible Macintosh Computers (8/94)", savagetaylor.com mirror (retrieved 2026-10-04). Supported and unsupported models for A/UX 3.0.1 and 3.0.2; enabler advice; A/UX 3.1 support.
  21. ↑ Apple Computer, Tech Info Library article 14724, "Where to Find Apple Support", created 24 February 1994, modified 6 November 2000, savagetaylor.com mirror (retrieved 2026-10-04).
  22. ↑ 22.0 22.1 22.2 Internet Archive, "DOWNLOAD.INFO.APPLE.COM FTP Site", item download.info.apple.com.2012.11, captured November 2012, uploaded 27 November 2012; browsable zip listing (retrieved 2026-10-04). Folder and file names below are from the listing download.info.apple.com.2012.11.zip.ls.txt in the same item.
  23. ↑ Apple Computer, System 7.5 Version 7.5.3 information file (System_7.5.3_Info.txt), in Macintosh/System/Older_System/System_7.5_Version_7.5.3 of the archived server, archive.org item download.info.apple.com.2012.11. Released 30 January 1999; 19 parts; includes System 7.5 Update 2.0 and 7.5.3 Revision 2.
  24. ↑ Apple Computer, Tech Info Library article 5934, "A/UX 3.0 Workstation Information (9/94)", savagetaylor.com mirror (retrieved 2026-10-04).
  25. ↑ Wikipedia, "A/UX" (retrieved 2026-10-04). Announcement of 1.0 at Uniforum, February 1988; 2.0 in mid-1990; discontinued in 1995 with 3.1.1.
  26. ↑ 26.0 26.1 26.2 26.3 26.4 Apple Computer, A/UX Installation Guide (A/UX 3.0), 1992. Hosted as File:A-UX 3.0 Installation Guide (Apple, 1992).pdf; see A/UX 3.0 Installation Guide (1992). Chapter 1, "What you need", pp. 1-2 to 1-3 (PDF pp. 15-16); appendix C, Troubleshooting, pp. C-2 to C-6 (PDF pp. 119-123).
  27. ↑ Apple Computer, Tech Info Library article 3007, "A/UX 3.0: Memory Requirements (8/94)", savagetaylor.com mirror (retrieved 2026-10-04).
  28. ↑ Internet Archive items Macintosh_A_UX_2.0_Installation_Disc (CD image 689-0049-A), aux-3.0.1-install (AUX_3.0.1_Install.iso and Bootdisk.img) and apple-aux-3.1-update (AUX_3.1_Update.iso), file lists retrieved 2026-10-04. Community uploads, not Apple's own server.
  29. ↑ bitsavers.org, pdf/apple/mac/a_ux/ directory listing (retrieved 2026-10-04): folders aux_1.0, aux_1.1, aux_2.0, aux_2.0.1, aux_3.0 and x11_2.1.
  30. ↑ 30.0 30.1 30.2 30.3 Apple Computer, Tech Info Library article 22225, "Apple Video Player 1.7.2: Read Me", 5 August 1998, savagetaylor.com mirror (retrieved 2026-10-04). Version 1.7.2 released 3 August 1998; requirements; installation; window sizes; capture advice; password reset.
  31. ↑ Apple Computer, Tech Info Library article 21076, "Macintosh Performa 6400, 6360: Why Apple Video Player? (3/97)", savagetaylor.com mirror (retrieved 2026-10-04).
  32. ↑ Apple Computer, Tech Info Library article 20521, "Apple Video Player: Video Startup Not Installed (10/96)", savagetaylor.com mirror (retrieved 2026-10-04).
  33. ↑ 33.0 33.1 Apple Computer, Tech Info Library article 30342, "Apple TV/Video System: Not Recognizing The TV Tuner", created 16 January 1998, modified 17 September 1999, savagetaylor.com mirror (retrieved 2026-10-04).
  34. ↑ Apple Computer, Tech Info Library article 24462, "Mac OS 8: Cannot Launch Apple Video Player or FM Radio", savagetaylor.com mirror (retrieved 2026-10-04).
  35. ↑ Apple Computer, Apple Video System User's Manual, 1996, p. 53 (PDF p. 59). Hosted as File:Apple Video System User's Manual (1996).pdf.
  36. ↑ Apple Computer, Tech Info Library article 24807, "Apple Video Player: Not For Recording DV Video", savagetaylor.com mirror (retrieved 2026-10-04).


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