Mac OS
Mac OS [ Mek oʊɛs ] is the name of the operating system from Apple for Macintosh computers. The term is derived from Macintosh Operating System, a name which was never used. In contrast to other popular operating systems Windows, and Linux distributions write the license terms of Mac OS prior to using the system only on the computers from Apple, as well as on various so-called licensed Mac clones, which were manufactured in the 1990s.
Mac OS
Mac OS is a registered trademark that ( previously Apple Computer, Inc. ) is a series of GUI -based operating systems by Apple Inc. for their Macintosh computer systems.
The operating system, which was later referred to by Apple as Mac OS, was an integral part of the system software of the Macintosh computer was published in 1984. At that time there was only called "System". It was a stripped down version of the system that had the previous generation of computers used Lisa.
For years, Apple has downplayed the existence of the operating system on purpose to let the Macintosh systems appear more user friendly and to distinguish themselves from other operating systems. Much of this early system software was directly stored in ROM. Updates for this were typically distributed free of charge by Apple dealers on floppy disks.
With increasing storage capacity and it was impossible to keep a modern GUI operating system in ROM and update it, so that the later versions (System 7, System 7.5 and System 7.6 in 1997) was sold as a separate, fee-based products.
Versions
The early Macintosh operating system consisted of two parts: the "System" and "Finder", each with its own version number and was programmed in Pascal. System 7.5 was the first with built-in Mac OS logo ( a variation of the original Happy Mac icon, which was displayed at power up). System 7.6 was the first Mac operating system also so named, allowing users to make it compatible with Apple in context, even if they used a clone of other manufacturers.
Until the advent of the later PowerPC G3 systems, large parts of the system were stored in physical ROM on the motherboard of the computer. The original use was to not to use the limited storage capacity of floppy disks for the system. The first Macs were shipped without HDD. Only a model of the Macintosh line was ever alone from the ROM bootable: The Macintosh Classic from 1991 This architecture also allowed for a completely graphical operating system without a command-line mode..
Abstürzende software and even hardware failure such as a lack of disk drives were the user communicates graphically combinations of icons, windows Note, buttons, the mouse and the distinctive Chicago bitmap font.
Mac OS depended on this core system software from the motherboard ROM. This later helped ensure that it could only be done by Apple computers or licensed clones ( with the copy legally protected ROMs from Apple).
Mac OS (1984-2001)
The classic Mac OS falls on mainly by the absence of a command line - the user interface is so completely graphically. Famous for its excellent usability and be cooperative multitasking, it would require the support of memory protection ( RAM ) and its susceptibility to conflicts among operating system extensions was ( eg, drivers ) criticized for the absence.
Some extensions could not work together or only worked if they were loaded in a specific order. For Macintosh, the Macintosh File System ( MFS) was originally used, which did not allow subfolders and is therefore also called "flat file system ". It was introduced in 1984 and replaced in 1985 by the Hierarchical File System Hierarchical File System (HFS ) with a real tree. Both file systems are compatible, however, brought the new HFS functions problems when exchanging data with other non-Mac file systems.
Later Power Macs shipped with Mac OS 9.2 and Mac OS X, but had Mac OS 9.2 installed separately by the user. The last version of the classic Mac OS was Mac OS 9.2.2.
Mac OS was further supported in the form of a compatibility environment called "Classic" to Mac OS X v10.4 Tiger. An original " Blue Box " program called emulates a PowerPC Mac and allows the installation of an original Mac OS 9.2, which is running as an application on Mac OS X. The desktop background of this system is hidden, thereby reducing the running under this system "classic" MacOS programs are free to move. This emulation also still allows the execution of 68k programs, almost with an emulator within an emulator.
The Classic environment was adjusted with Mac OS X 10.5 " Leopard", it was only available for PowerPC -based Macs, but not for Intel-based.
Mac OS X
Mac OS X is a completely newly developed system based on Darwin ( operating system). It replaced from 2000, before former system.