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System 7 (whose codename being "Big Bang", reflects on the considerable changes that came with the OS) is the term used to refer to the Mac OS that superseded the earlier versions known simply as "The System", or "System 6", and before the use of the term "Mac OS" came into official use.
Balloon Help provided on screen tooltips. A Help menu was added to the menu bar to control it.
The Apple menu (previously home only to Desk Accessories pulled from DRVR resources in the System file) now listed the contents of a folder, including aliases. Desk Accessories had originally been intended to provide a form of multitasking and were no longer necessary now that multitasking was always enabled. The desk accessory technology was deprecated, with System 7 treating them largely the same as other applications.
The Mac OS 7.5.3 Desktop
data "published" by one application to be imported ("subscribed") by another, and the data could be updated dynamically. The Nike Air More Uptempo Men's Shoe feature was not terribly popular with programmers, who found the API unwieldy, and users didn't seem all that interested either. Relatively few applications ended up adopting it.
Application menu. A list of running applications, formerly at the bottom of the Apple menu under MultiFinder, was moved to its own menu on the right, along with Hide and Unhide functionality.
to be truly comfortable.
Aliases: small files that "pointed to" other files on the system. This was added to help the user navigate the increasingly larger disks that were starting to appear.
System 7.0 was released for the Apple Macintosh on May 13, 1991. It offered a number of system enhancements that were either previously not available, or were optional extensions to the operating system.
In a similar fashion, system "extensions" were also improved by placing them in their own folder (rather than the System folder's root), and holding down the Shift key during bootup would disable them. The line between extensions and control panels was blurred, extensions basically being GUI less control panels.
7, though new hardware soon made up for the speed loss. Another problem was System 7's large "memory footprint"; System 6 would run on a single floppy and took up about 600k of RAM, whereas System 7 used well over a megabyte and could no longer be run from floppy only machines. It was some time before the average Mac shipped with enough RAM built in for System 7 Nike More Uptempo Retail Price
Publish and Subscribe. This feature permitted Nike Air More Uptempo Asia Hoop Pack
Built in co operative multitasking. Previously this function was available through MultiFinder in System 6, or not available at all. Because more than one application could run at a time, Desk Accessories were deprecated, System 7 treating them no different from other applications.
A new full colour user interface was included which gave a neat colour appearance on colour machines but which gracefully dropped back to the standard black and white interface on machines not supporting colour.
The Trash was now a real folder instead of the special status it previously had. This allowed items to be put in the trash on different volumes, each one having its own Trash.
A new Sound Manager API which replaced the older ad hoc APIs that did not abstract the hardware to any great degree. (This was also included with System 6.0.8.)
The Control Panel became the Control Panels became individual "windows of options" accessible from the Control Panels folder in the Finder, instead of being accessible using the previous Control Panel Desk Accessory in earier system versions.
32 bit QuickDraw, supporting so called "true colour" imaging was included as standard was previously available as a system extension.
System 7 started to pave the way to move to a full 32 bit address space, from the previous 24 bit address space, which limited memory to a maximum of 8MB. This process involved making all of the routines in OS code use the full 32 bits of a pointer as an address prior systems used the upper bits as flags. This change was known as being "32 bit clean". While System 7 itself was 32 bit clean, many existing machines and thousands of applications were not, so it was some time before the process was completed. non "32 bit clean") Macs no longer ran any version of the system software as of version 7.6.
There were also a large number of architectural changes to make the OS more coherent and stable. Apple boasted on its release that System 7 was "rock solid", and while it was a great improvement over the earlier systems, the claim was rather hyperbolic. This became somewhat empty over the following years, as stability of the system degraded terribly as the complexity of the systems grew. Later versions of System 7 were notoriously unreliable, often freezing the entire machine after benign application errors. In particular, before Mac OS 7.6.1, almost all errors caused by a PowerPC application caused Type 11 errors and so caused the whole system to crash.
AppleScript. This was an entire architecture for making scriptable applications. While fairly complex for programmers to implement, this feature was powerful and popular with users, and is still available to this day as part of Mac OS X.
Personal File Sharing. Along with various user interface improvements for AppleTalk setup, System 7 also included a basic file sharing server allowing any machine to publish folders to the AppleTalk network.
Many also felt that performance suffered as a result of upgrading from System 6 to System Nike Air Max Uptempo Release Dates
TrueType, a new outline font technology developed by Apple.
a wiki about Macs
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