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1995 Mac OS 7.5

1995 Mac OS 7.5.1 (Danook)

Mac OS 7.5.1, also known as System 7.5.1 and System 7.5 Update 1.0, was released on March 23, 1995. The update, delivered on four floppy disks, included both bug-fixes and enhancements to the Mac OS.

Description[]

The most significant indication this update was applied is the startup process eye candy. Where System 7.5 still greeted users with the traditional "Welcome to Macintosh" rectangle, starting with Mac OS 7.5.1 they were greeted with the large and colourful "Welcome to Mac OS" dialog. (Startup dialogues in some languages, notably German, remained "Willkommen!" ("Welcome!") both under 7.5 and 7.5.1, as well as subsequent versions.) However, until Mac OS 7.6, the "Welcome to Macintosh" dialogue appeared at first, then the "Welcome to Mac OS" dialog appeared with the progress bar. The Mac OS logo made its debut in this version of the Mac OS. Strictly speaking, this was the first version of the Macintosh system to be called Mac OS instead of Macintosh System, although Apple kept the "System" moniker through version 7.5.5, and even some refer to versions 7.6 and 7.6.1 as "System" 7.6 and "System" 7.6.1.

Mac OS 7.5.1 improved memory stability and corrected problems that could lead to a crash when large chunks of data were being pasted. It also fixed a bug where double-clicking on an alias on the Desktop resulted in the wrong file opening. Laptop-specific improvements were introduced as well: for the aging PowerBook 150, battery life was extended by cutting down on the power consumption needed while the portable was asleep. On the relatively newer PowerBook 500 series, trackpad performance was optimised.

Other included updates[]

Along with these new features, the "secret about box" of System 7.5 was broken; however, through tricky means, it was still restorable, and Mac OS 7.5.2, quickly introduced a new functional version.

System 7
System 7.0.x : 7.0 | 7.0.1 | Tune-Up 1.0 · 1.1 · 1.1.1 (Tuna Helper)
System 7.1.x : 7.1 | 7.1.1 (Pro) | 7.1.2
  System / Mac OS 7.5.x : 7.5 | 7.5.1 | 7.5.2 | 7.5.3 | 7.5.3L | 7.5.3 Rev 2 · 2.1 · 2.2 | 7.5.4 | 7.5.5
Mac OS 7.6.x : 7.6 | 7.6.1
Mac OS 7.7.x : 7.7 (beta)
Performa Systems : 7.0.1P | 7.1P | 7.1P1 | 7.1P2 | 7.1P3 | 7.1P4 | 7.1P5 | 7.1P6 | 7.1.2P
← System 6 | System 7 | Mac OS 8 →
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