Early versions of Mac OS were compatible only with Motorola 68000-based Macintoshes. As Apple introduced computers with PowerPC hardware, the OS was ported to support this architecture. Mac OS 8.1 was the last version that could run on a "68K" processor (the 68040). OS X, which has superseded the "Classic" Mac OS, is compatible with only PowerPC processors from version 10.0 ("Cheetah") to version 10.3 ("Panther"). PowerPC and Intel processors are supported in version 10.4 ("Tiger", Intel only supported after an update) and version 10.5 ("Leopard"). 10.6 and later versions support only Intel processors.
The early Macintosh operating system initially consisted of two pieces of software, called "System" and "Finder", each with its own version number. System 7.5.1 was the first to include the Mac OS logo (a variation on the original Happy Mac startup icon), and Mac OS 7.6 was the first to be named "Mac OS".
Before the introduction of the later PowerPC G3-based systems, significant parts of the system were stored in physical ROM on the motherboard. The initial purpose of this was to avoid using up the limited storage of floppy disks on system support, given that the early Macs had no hard disk (only one model of Mac was ever actually bootable using the ROM alone, the 1991 Mac Classic model). This architecture also allowed for a completely graphical OS interface at the lowest level without the need for a text-only console or command-line mode. Boot time errors, such as finding no functioning disk drives, were communicated to the user graphically, usually with an icon or the distinctive Chicago bitmap font and a Chime of Death or a series of beeps. This was in contrast to computers of the time, which displayed such messages in a mono-spaced font on a black background, and required the use of the keyboard, not a mouse, for input. To provide such niceties at a low level, Mac OS depended on core system software in ROM on the motherboard, a fact that later helped to ensure that only Apple computers or licensed clones (with the copyright-protected ROMs from Apple) could run Mac OS.
Mac OS can be divided into two families:
- The Mac OS Classic family, which was based on Apple's own code
- The OS X operating system, developed from Mac OS Classic family, and NeXTSTEP, which was UNIX-based.
Read more about this topic: Mac OS
Other articles related to "versions, version":
... These early hand-copied versions end abruptly at the latest at the 80th chapter ... These manuscripts are the most textually reliable versions, known as Rouge versions (脂本) ... Most modern critical editions use the first 80 chapters, based on the Rouge versions ...
... The Jaguar version was published by Atari and was released on November 28, 1994 ... Though the first console port of Doom, this version has more levels than the SNES and 32X versions, and as many levels as the 3DO and GBA versions ... It features 22 of the PC version's 27 levels, though many of them are simplified, plus 2 new levels (the levels titled "Tower of Babel" and "Hell Keep" are not the same as the PC levels of ...
... Export versions included the Corsair V-65F, V-66F and V-80Fp for the Argentine Navy, the V-80P for the Peruvian Air Force, and the V-85G for Germany ... In March 1929, Mexico purchased 12 armed aircraft O2U-2M versions with the 400 hp (300 kW) Wasp engine to quell a military coup Mexico then built 31 more ... China purchased the 42 export versions of O2U-1 from 1929–1933, and 21 export versions of O3U between 1933–1934 and they saw extensive bombing actions ...
... format is popular in Japan and several versions of EVA Animator software have been sold and included as standard software in Japanese Sharp notebook computers such as the Mebuis ... Japan, the Animator software itself only works in Japanese versions of Windows and has never been ported to the English versions ...
... In the early 1990s, Adobe released versions of Illustrator for NeXT, Silicon Graphics, and Sun Solaris platforms, but they were discontinued due to poor market acceptance ... The first version of Illustrator for Windows, version 2.0, was released in early 1989 and flopped ... The next Windows version, version 4.0, was widely criticized as being too similar to Illustrator 1.1 instead of the Macintosh 3.0 version, and certainly not the equal of Windows' most popular illustration ...
Famous quotes containing the word versions:
“The assumption must be that those who can see value only in tradition, or versions of it, deny mans ability to adapt to changing circumstances.”
—Stephen Bayley (b. 1951)