System 6

Last updated
System 6
Version of the classic Mac OS operating system
Macintosh system 6.0.8.png
System 6.0.8
Developer Apple Computer
OS family Macintosh
Source model Closed source
Released to
manufacturing
April 1988;36 years ago (1988-04)
Latest release 6.0.8 / May 1991;33 years ago (1991-05) [1]
Kernel type Monolithic
License Proprietary
Preceded by System 5
Succeeded by System 7
Support status
Historical, unsupported

System 6 (or System Software 6) is the sixth major release of the classic Mac OS operating system for Macintosh computers, made by Apple Computer. It was released in 1988. It is a monolithic operating system, with cooperative multitasking based on an improved MultiFinder. The boxed version cost US$49(equivalent to about $130 in 2023), and it was included with all new Macintosh computers until 1991, when it was succeeded by System 7. [2]

Contents

Overview

MacroMaker

The MacroMaker utility was introduced in System 6. [3] It records mouse and keyboard input as macros, and has a unique user interface intended to look and act like a tape recorder. [4] MacroMaker was criticized for its lack of features when compared to Microsoft's AutoMac III, which was already available commercially. As MacroMaker records only the locations of mouse-clicks inside windows and not what is being clicked on or exactly when, it can not be used to automate actions in more sophisticated programs. The pre-recorded clicks miss buttons if the buttons had moved since the recording, or if they failed to appear upon playback. [4] It records the start and end locations of mouse movements, but does not track the precise path of a movement or support pauses. [5] MacroMaker is not compatible with System 7, in which it is succeeded by AppleScript.[ citation needed ]

Multitasking

Macintosh gained cooperative multitasking in March 1985 with Andy Hertzfeld's Switcher, which can switch between multiple full-screen applications. [6] It was not integrated, and was only sold separately by Apple. Not many programs and features function correctly with Switcher, and it does not share the screen between applications simultaneously. Systems 5 and 6 have MultiFinder instead, [7] which is much more mature and widely used in System 6. With MultiFinder, the Finder does not quit to free resources, and the system behaves as in the still-familiar multitasking fashion, with the desktop and other applications' windows in the background.[ citation needed ]

Hardware support

System 6 includes support for the Apple ImageWriter LQ and PostScript laser printers. New software drivers allow the ImageWriter LQ to be used on AppleTalk local area networks and supports the use of tabloid or B-size paper (11 in × 17 in or 280 mm × 430 mm). System 6 includes QuickerGraf (originally QuickerDraw), system software used to accelerate the drawing of color images on the Macintosh II. It was licensed to Apple and Radius Inc. by its programmer, Andy Hertzfeld. [3]

Limitations

In comparison to the NeXTSTEP operating system of the time, System 6 does not make much use of sound, and its user interface is limited in file management and window displays. [8] System 6's Apple menu cannot be used to launch applications. The icon in the upper right-hand corner of the menu bar simply shows the open application and is not a menu. [9] System 6 supports 24  bits of addressable RAM (random-access memory), which allows for a maximum of 8  megabytes of RAM, with no provision for virtual memory. [10] These limitations were removed in System 7. System 6's version of the HFS file system also has a volume size limit; it supports up to 2  gigabytes (GB) and 65,536 files on any one volume. [11] System 7.5 increased this limit to 4 GB.[ citation needed ]

The Trash (known as the "Wastebasket" in the British-English version) empties when the Finder terminates. If MultiFinder is not running, this occurs as soon as an application launches. Icons on the Desktop in System 6 are not organized into a single folder, as in later operating systems. Instead, the system records if a file is on the Desktop. [12] This is inefficient and confusing, as the user cannot browse to the Desktop in applications besides the Finder, even within the standard Open and Save As dialog boxes. Furthermore, these dialogs are primitive, and were mostly unchanged since 1984. The lack of aliases, shortcuts to files, is another limitation of file management on System 6, [13] and custom file and folder icons are not supported. These issues were all remedied in System 7.[ citation needed ]

A maximum of 15 desk accessories may be installed at one time, including the Chooser, Scrapbook, and Control Panel. System 6 uses the Control Panel desk accessory to access all the installed control panels, which imposes severe user-interface limitations. [14] [ failed verification ] Desk Accessories cannot be installed or removed within the Finder; this requires the Font/DA Mover utility. System 7 also fixed this. Control Panels, however, are contained in separate files.[ citation needed ]

The interface is not very customizable. The Finder allows each icon to be assigned a color, but the desktop background is limited to an 8x8-pixel color tiled pattern (color patterns were introduced in System 5), [15] and standard window frames are black-and-white. However, many "INIT" extension files exist to add color and customization. [16] System 7 allows the user to change the color of window frames and various other aspects of the user interface. [8] By 1989, the System 6 user interface was in need of a change. [8]

Reception

Initial releases of System 6 are unstable; Don Crabb of BYTE described 6.0 as "buggy and unreliable". [17] Many third-party developers did not receive advance copies, resulting in widespread compatibility issues. [2] The contemporary versions of many common programs such as Microsoft Excel, Microsoft Works and 4th Dimension were not fully compatible with System 6. [2] There were also software bugs in the Color Manager, Script Manager, and Sound Manager extension files. Apple announced that 66 bugs were fixed with version 6.0.1 update, in September 1988. [18] [19] However, a major bug involving the text-spacing of screen fonts was found, and was fixed in version 6.0.2, [19] which Crabb described as "a huge improvement" over 6.0. [17] Some customers waited longer until moving to System 6 because of its poor reputation. [20]

Compatibility

System 6 was officially supported by Apple for many different machines, some of which shipped with it. Some unsupported Macintosh computers can run it with limitations. [21] [22]

Macintosh ModelModel Date6.0.8 [21] 6.0.7 [21] 6.0.5 [21] 6.0.4 [21] 6.0.3 [21] 6.0.2 [21]
128K 1984NoNoNoNoNoNo
512K NoNoNoNoNoNo
512Ke 1986Yes [23] Yes [23] Yes [23] Yes [23] Yes [23] Yes [23]
Macintosh XL 1985NoNoNoNoNoNo
Plus 1986YesYesYesYesYesYes
SE 1987YesYesYesYesYesYes
SE/30 1989YesYesYesNoYesYes
Classic 1990YesYesYesYesYes [24] No
Classic II 1991Yes: 6.0.8L [25] NoNoNoNoNo
Portable 1989YesYesYesYesYesYes
II 1987YesYesYesYesYesYes
IIx 1988YesYesYesYesYesYes
IIcx 1989YesYesYesYesYesYes
IIci YesYesYesYesNoNo
IIfx 1990YesYesYesNoNoNo
IIsi YesYesNoNoNoNo
LC YesYesNoNoNoNo
LC II 1992YesNoNoNoNoNo
Quadra 700 1991NoNoNoNoNoNo
Quadra 900/950 1991/1992NoNoNoNoNoNo
PowerBook 100 1991Yes: 6.0.8L [25] Partial: limited [22] Partial: limited [22] NoNoNo
PowerBook 140
145/145B/170
1991/1992/1993NoNoNoNoNoNo

Version history

System version [26] Release date [26] Finder version [26] MultiFinder version [26] LaserWriter version [26] Release information [26]
6.0April 1988[ citation needed ]6.16.05.2Initial release
6.0.1September 19, 19886.1.16.0.1Release for Macintosh IIx (1988)
6.0.2September 19, 19886.16.0.1Maintenance release
6.0.3December 23, 1988 [27] 6.0.3Maintenance release with bug fixes for Apple File Exchange, Time Manager, and other components. New York 18 and 24 fonts were removed.
6.0.4September 20, 19896.1.46.0.4Release for Macintosh Portable and IIci (1989)
6.0.5March 19, 19906.1.56.0.5Release for Macintosh IIfx (1990)
6.0.6March 19, 1990 - October 15, 19906.1.66.0.6Packed with early Macintosh IIsi, LC, and Classic; contains bugs with keyboard and AppleTalk. [28]
6.0.7October 15, 19906.1.76.0.7Official release for Macintosh LC, IIsi, and Classic (1990)
6.0.8May 13, 19916.1.86.0.87.0Updated printing software to match the printing software of System 7.0
6.0.8LMarch 23, 1992 [25] Used only on the Macintosh Classic, Classic II, LC, LC II, and PowerBook 100.

Timeline

Timeline of Mac operating systems
ARM architecture familyx86PowerPC68kMacBook Air (Apple silicon)iMac ProRetina MacBook ProMacBook AirApple–Intel architecturePower Mac G5Power Mac G4iMac G3Power MacintoshMacintosh QuadraMacintosh PortableMacintosh SE/30Macintosh IIMacintosh PlusMacintosh 128KmacOS SequoiamacOS SonomamacOS VenturamacOS MontereymacOS Big SurmacOS CatalinamacOS MojavemacOS High SierramacOS SierraOS X El CapitanOS X YosemiteOS X MavericksOS X Mountain LionMac OS X LionMac OS X Snow LeopardMac OS X LeopardMac OS X TigerMac OS X PantherMac OS X 10.2Mac OS X 10.1Mac OS X 10.0Mac OS X Server 1.0Mac OS X Public BetaA/UXA/UXA/UXMacWorks XLMacWorks XLSun RemarketingMacWorks XLMac OS 9Mac OS 9Mac OS 9Mac OS 8Mac OS 8Mac OS 8Mac OS 8System 7System 7System 7System 7System 6Classic Mac OSClassic Mac OSClassic Mac OSClassic Mac OSSystem 1Finder (software)Finder (software)Finder (software)Finder (software)Finder (software)Finder (software)Finder (software)System 6

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References

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Preceded by System 6
1988
Succeeded by