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The original 1984 Mac OS desktop featured a radically new graphical user interface. The original 1984 Mac OS desktop featured a radically new graphical user interface. System 7 was the first major upgrade of the Macintosh operating system. System 7 was the first major upgrade of the Macintosh operating system. The Mac OS X v10.5 “Leopard” desktop. Although the interface has undergone many changes, some aspects remain, such as the menu bar at the top of the screen. The Mac OS X v10.5 “Leopard” desktop. Although the interface has undergone many changes, some aspects remain, such as the menu bar at the top of the screen.
The Macintosh operating system was originally known as the System Software or more simply System. With the release of System 7.6, the official name became Mac OS. From 2001, the “classic” Mac OS was phased out in favor of the new BSD Unix-based Mac OS X. Apple had offered another UNIX system, A/UX, for its Macintosh servers earlier, but without much success. The Mac OS operating system is widely considered one of the main selling points of the Mac platform, and Apple heavily touts its releases with large release-day special events. Apple has generally chosen to stick with some loose user-interface elements in all of its releases, and many similarities can be seen between the legacy Mac OS 9 and the modern Mac OS X.
Innovative with Full Colour plus Multitasking
Mac OS was the first widely used operating system with a graphical interface. No versions of the "classic" Mac OS featured a command line interface. It was originally a single-tasking OS with limited background execution ability, but optional co-operative multitasking was introduced in System Software. The next major upgrade was System 7 in 1991, which featured a new full-color design, built-in multitasking, AppleScript, and more user configuration options. Mac OS continued to evolve up to version 9.2.2, but its dated architecture—though retrofitted a few times e.g. as part of the PowerPC port, a nanokernel was added and later in Mac OS 8.6 was modified to support Multiprocessing Services which made a replacement necessary.
Unix Base Introduction & Backward Compatibility Hurdles
In March 2001, Apple introduced Mac OS X, a modern and more secure Unix-based successor, using Darwin, XNU, and Mach as foundations. Mac OS X is directly derived from NeXTSTEP, the operating system developed by Steve Jobs’ company NeXT before Apple bought it. Older Mac OS programs can still run under Mac OS X in a special virtual machine called Classic, but this is only possible using Apple software on Macs using PowerPC processors. (Macs using Intel processors need third party software to run older code). A program similar to Classic called "Rosetta" will allow PowerPC programs to run on Intel machines. Mac OS X remains the most common UNIX-based desktop operating system, and even though Mac OS X was never originally certified as a UNIX implementation by The Open Group, Apple is currently working on full UNIX compliance and certification for its next server release. Mac OS X is currently at version 10.4 (released on April 29, 2005), code-named Tiger. The next version, Mac OS X v10.5, code-named Leopard, is scheduled to be released in October of 2007.
Current OS Influences
Non-Apple operating systems for today’s Macs include Linux, NetBSD, and OpenBSD. With the release of Intel-based Mac computers, the potential to natively run Windows-based operating systems on Apple hardware without the need for emulation software such as "Virtual PC" was introduced. In March of 2006, a group of hackers announced that they were able to run Windows XP on an Intel based Mac. The group has released their software as open source and has posted it for download on their website. On April 5, 2006 Apple announced the public beta availability of their own Boot Camp software which will allow owners of Intel-based Macs to install Windows XP on their machines. Also, later versions of the beta gained support for Windows Vista. Boot Camp will be a standard feature in Leopard (Mac OS X 10.5).
Apple Workgroup Server
Figure 1. Macintosh Server Timeline
(AWS or sometimes WGS) and, later, Macintosh Server, were the names given to selected models of Macintosh computers which were sold by Apple Computer with additional server software and sometimes bigger hard drives. Apart from that, they were mostly identical to computers out of Apple's workstation range. The "Workgroup Server" name was used on the models based on Centris, Quadra and early Power Macintosh series, while the servers based on the Power Macintosh G3 and Power Mac G4 were called "Macintosh Server G3" and "Macintosh Server G4". The first model was the Workgroup Server 95, introduced in March 1993; the last of the series was quietly discontinued in January 2003, after the introduction of the Xserve made them obsolete.
The Intel-based Xserves were announced at the Worldwide Developers Conference on August 7, 2006. They use Intel Xeon ('Woodcrest') processors at 2 GHz, 2.66 GHz, or 3 GHz, FB-DIMM DDR2, ATI Radeon X1300 graphics, a maximum storage capacity of 2.25 TB when used with three 750GB drives, optional redundant power supplies and a 1U rack form factor. The Intel Xserves now have their graphics cards on-board, meaning that you do not need to sacrifice a PCI slot to add video capabilities --a departure from G4 and G5 Xserves.