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System_4.0

System 4.0

Macos42-1-1

System 4 desktop

System 4 is the fourth major upgrade of the Macintosh system software. System 4 was first released in January 1987.

New features[]

System 4.0[]

  • Was a minor update from System 3, but did have some changes and new features.
  • Introduced AppleShare client, to connect to file servers, as part of the OS.
  • Updated the LaserWriter Driver to 3.3.
  • Color Display Support/color support was added for the first time
  • Included with the Macintosh SE.

System 4.1[]

  • Updated the LaserWriter Driver to 4.0.
  • Included with the Macintosh II.

System 4.2[]

  • Improved the "About the Macintosh" dialog box; now contained RAM usage as seen through Mac OS 9.
  • The Color menu was displayed on color capable Macs.
  • Backgrounder, DA Handler, Early Access, and Print Moniter were added.
  • Cooperative multitasking via MultiFinder was added.
  • Updated the LaserWriter Driver to 5.0.

System 4.3[]

  • Updated the Apple HD SC Setup partitioning software.
  • Updated the LaserWriter Driver to 5.1.

Release history[]

References[]

External links[]

System 4
System 4.0 | System 4.1 | System 4.2 | System 4.3
← System 3 | System 4 | System 5
Mac OS   Classic Mac OS versions
Macintosh System Software : System 1 · System 2 · System 3 · System 4 · System 5 · System 6 · System 7
Mac OS : Mac OS 7.6 · Mac OS 8 · Mac OS 9 · Classic environment
Cancelled : Copland · Gershwin
Deprecated in in May 2002 and succeeded by Mac OS X
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