| rdfs:comment
| - MacOS (the Macintosh Operating System)--specifically "MacOS Classic"--was a computer operating system created by Apple Computer for use in its personal-use-oriented computer systems which began production and sale on January 24th, 1984. The "classic" MacOS (versions 1 through 9) were cooperative multi-tasking operating systems, and were often known amongst computer enthusiasts for their propensity for regular crashes, which required full reboots of the computer systems in order to recover from.
- The classic Mac OS was originally written for the Motorola 68k architecture. The 68k architecture was used from 1984 to 1991, after which Apple transitioned to PowerPC. PowerPC would be used until the classic Mac OS's discontinuation in 2002. Classic Mac OS was based on a simple kernel design, which eventually became too limited and crash prone for applications. In response, Apple bought NeXT and used NeXTSTEP as a base to develop Mac OS X. Mac OS X continued PowerPC support until 2006, when Macs started shipping with x86 (Intel) processors. Support for PowerPC in Mac OS X was dropped in 2009.
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| abstract
| - The classic Mac OS was originally written for the Motorola 68k architecture. The 68k architecture was used from 1984 to 1991, after which Apple transitioned to PowerPC. PowerPC would be used until the classic Mac OS's discontinuation in 2002. Classic Mac OS was based on a simple kernel design, which eventually became too limited and crash prone for applications. In response, Apple bought NeXT and used NeXTSTEP as a base to develop Mac OS X. Mac OS X continued PowerPC support until 2006, when Macs started shipping with x86 (Intel) processors. Support for PowerPC in Mac OS X was dropped in 2009. The Classic Mac OS can run standalone, and under Mac OS X using the Classic system layer. Only certain versions of Mac OS 9 can run under the Classic system layer, and the layer itself was dropped after Mac OS X Tiger. PearPC is a useful emulator that can run PowerPC builds of Mac OS X under Windows or other x86 operating systems.
- MacOS (the Macintosh Operating System)--specifically "MacOS Classic"--was a computer operating system created by Apple Computer for use in its personal-use-oriented computer systems which began production and sale on January 24th, 1984. The "classic" MacOS (versions 1 through 9) were cooperative multi-tasking operating systems, and were often known amongst computer enthusiasts for their propensity for regular crashes, which required full reboots of the computer systems in order to recover from. Mac OS X (MacOS versions starting with 10.0) signify a major change in the base software of the MacOS, as these products are based upon FreeBSD UNIX. This affords the MacOS with an unprecedented level of stability. Moreover, the Mac OS X paves the way for Apple's computer system offerings to take advantage of much more modern hardware (peripherals), and also has allowed Apple to transition the processors used by its computer systems from the Motorola/IBM-produced PowerPC G4 and PowerPC G5 to the more-industry-standard Intel Core-class processors. Arguably, from a purist user's standpoint, the toughest part of Apple's transition from MacOS "Classic" to Mac OS X on Intel CPU's is the loss of the ability to run "Classic" apps on the Intel-based systems. As a workaround, however, emulation software such as Basilisk II or SheepShaver have emerged to allow greater or lesser degrees of support for such legacy applications.
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