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erating system to display the mac os logo on the splash screen system 7 5 2 power macs that use pci usable only on these power macs and powerbooks 5300 190 and duo 2300 system 7 5 3 system 7 5 update 2 0 system 7 5 3l only for macintosh clones system 7 5 3 revision 2 system 7 5 3 revision 2 1 only for performa 6400 180 and 6400 200 system 7 5 4 withdrawn within hours of release and replaced by 7 5 5 system 7 5 5 last to support non 32 bit clean macs including all with less than a 68030 cpu except the macintosh lc mac os 7 6 name formally changed because of the experimental clone program although system 7 5 1 and later used the mac os name on the splash screen mac os 7 6 1 proper powerpc error handling introduced mac os 8 edit main article mac os 8 mac os 8 1 desktop mac os 8 was released on july 26 1997 the same month steve jobs became the de facto ceo of apple it was mainly released to keep the mac os moving forward during a difficult time for apple initially planned as mac os 7 7 it was renumbered 8 to exploit a legal loophole and accomplish jobs s goal of terminating third party manufacturers licenses to system 7 and shutting down the macintosh clone market 38 mac os 8 added a number of features from the abandoned copland project while leaving the underlying operating system unchanged a multi threaded finder was included files could now be copied in the background the gui was changed in appearance to a new shaded greyscale look named platinum and the ability to change the appearance themes also known as skins was added with a new control panel though platinum was the only one shipped this capability was provided by a new appearance api layer within the os one of the few significant changes apple sold 1 2 million copies of mac os 8 in its first two weeks of availability and 3 million within six months in light of apple s financial difficulties at the time there was a large grassroots movement among mac users to upgrade and help save apple even some pirate groups refused to redistribute the os 39 mac os 8 1 edit mac os 8 1 introduced an updated version of the hierarchical file system named hfs which fixed many limitations of the earlier system and has been used in subsequent versions of macos up until macos high sierra when it was replaced with the apple file system there are some other interface changes such as separating network features from printing and some improvements to application switching however in underlying technical respects mac os 8 is not very different from system 7 mac os 8 5 edit mac os 8 5 focuses on speed and stability with most 68k code replaced by modern code native to the powerpc it also improved the appearance of the user interface although the theming feature was cut late in development system version 5 release information 5 mac os 8 0 first version to require a 68040 processor dropping support for the remainder of the macintosh ii series and other 68030 macs added support for powerpc g3 processor mac os 8 1 last mac os release to run on a 68k processor added support for usb and the hfs file system mac os 8 5 first version to require a powerpc processor added sherlock support for firewire and support for the power macintosh g3 mac os 8 5 1 bug fixes mac os 8 6 new nanokernel multiprocessing services 2 0 support improved powerbook battery life and added support for the powerpc g4 processor mac os 9 edit main article mac os 9 mac os 9 the last major revision of the classic mac os was released on october 23 1999 7 it is generally a steady evolution from mac os 8 early development releases of mac os 9 were numbered 8 7 mac os 9 added improved support for airport wireless networking it introduced an early implementation of multi user support though not a true multi user operating system mac os 9 does allow multiple desktop users to have their own data and system settings an improved sherlock search engine added several new search plug ins mac os 9 also provides a much improved memory implementation and management applescript was improved to allow tcp ip and networking control mac os 9 also makes the first use of the centralized apple software update to find and install os and hardware updates other new features included its on the fly file encryption software with code signing and keychain technologies remote networking and file server packages and much improved list of usb drivers mac os 9 also added some transitional technologies to help application developers adopt some mac os x features before the introduction of the new os to the public to help ease the transition these included new apis for the file system and the bundling of the carbon library that apps could link against instead of the traditional api libraries apps that were adapted to do this could be run natively on mac os x as well other changes were made beginning with the mac os 9 1 update to allow it to be launched in the classic environment within mac os x the final update to the classic mac os was version 9 2 2 released on december 5 2001 40 system version 5 release information 5 mac os 9 0 initial retail version of mac os 9 mac os 9 0 2 mac os 9 0 3 mac os 9 0 4 mac os 9 1 included with mac os x 10 0 mac os 9 2 update for improved mac os x compatibility mac os 9 2 1 mac os 9 2 2 final release of classic mac os transition to mac os x edit main articles macos and macos version history logos box art of macos from 10 0 10 1 to tahoe 26 macos originally mac os x and later os x 41 is apple s current mac operating system that officially succeeded the classic mac os in 2001 although it was originally marketed as simply version 10 of mac os it has a history that is largely independent of the earlier mac os releases the first version of mac os x mac os x server 1 0 released in 1999 retains the platinum appearance from the classic mac os and even resembles openstep in places with the first version to arrive with the new aqua user interface the first consumer version mac os x 10 0 was released on march 24 2001 supporting the new aqua user interface apple shortened the name to os x in 2011 and then changed it to macos in 2016 to align with the branding of apple s other operating systems the macos architectural legacy is the successor to mac os 9 and the classic mac os legacy however unlike the classic mac os it is a unix based operating system 42 built on nextstep and technology developed at next from the late 1980s until early 1997 when apple purchased the company and its ceo steve jobs returned to apple 43 macos also makes use of the bsd codebase and the xnu kernel 44 and its core set of components is based upon apple s open source darwin operating system users of the classic mac os generally upgraded to mac os x however mac os x was criticized in its early years as more difficult and less user friendly than the original mac os for the lack of certain features that had not yet been reimplemented in the new os for being slower on the same hardware especially older hardware and for incompatibilities with the older os 45 because drivers for printers scanners tablets etc written for the older mac os were not compatible with mac os x inconsistent program support with the classic environment program used to run the older operating system s programs on mac os x and the lack of mac os x support for older apple computers before late 1997 some macintosh users continued using the older classic mac os for a few years after the original release of mac os x steve jobs encouraged people to upgrade to mac os x by staging a mock funeral for mac os 9 at wwdc 2002 46 classic edit main article list of macos components classic powerpc versions of mac os x up to and including mac os x 10 4 tiger include a compatibility layer for running older mac applications the classic environment originally codenamed the blue box the environment runs a nearly complete mac os 9 operating system version 9 1 or later as a mac os x application this allows applications that have not been ported to the carbon api to run on mac os x this is reasonably seamless though classic applications retain their original mac os 9 appearance and do not gain the mac os x aqua appearance early new world rom powerpc based macs shipped with mac os 9 2 as well as mac os x mac os 9 2 had to be installed by the user it was not installed by default on hardware revisions released after mac os x 10 4 most well written classic mac os applications function properly under this environment but compatibility is assured only if the software was written to be unaware of the actual hardware and to interact solely with the operating system the classic environment is not available on intel based mac systems or the latest apple silicon macs due to the incompatibility of mac os 9 with both the x86 and arm hardware emulation edit 68k emulators edit see also mac os nanokernel and mac 68k emulator third party macintosh emulators such as vmac basilisk ii and executor eventually made it possible to run the classic mac os on intel based pcs these emulators were restricted to emulating the 68k series of processors and as such most could not run versions of the mac os that succeeded 8 1 which required powerpc processors most also required a mac rom image or a hardware interface supporting a real mac rom chip a notable exception was the executor commercial software product from abacus research development the only product that used 100 reverse engineered code without the use of apple technology it ran extremely quickly but never achieved more than a minor subset of functionality few programs were completely compatible and many were extremely crash prone if they ran at all executor filled a niche market for porting 68k mac applications to x86 platforms development ceased in 2002 and the source code was released by the author in late 2008 47 emulators using mac rom images offered near complete mac os compatibility and later versions offered excellent performance as modern x86 processor performance increased exponentially apple included its own mac 68k emulator that ran seamlessly on all powerpc based versions of the classic mac os 48 apple also sold a mac 68k emulator for sparc based solaris and pa risc based hp ux systems called macintosh application environment mae which could run variants of system 7 x inside an x11 window powerpc emulators edit in comparison with 68k emulator development powerpc emulation is more complex and requires more cpu power the qemu emulator is capable of running classic mac os and os x at full speed with networking and sound in most cases 49 qemu has official support for classic mac os version 9 0 through 9 2 and mac os x 10 0 up to and including 10 5 50 qemu has several advantages over other powerpc emulators such as supporting a wide range of platforms from linux to mac and windows on current cpu architectures 50 another powerpc emulator is sheepshaver which has been around since 1998 for beos on the powerpc platform but in 2002 was open sourced and efforts began to port it to other platforms originally it was not designed for use on x86 platforms and required an actual powerpc processor present in the machine it was running on similar to a hypervisor although it provides powerpc processor support it can run only up to mac os 9 0 4 because it does not emulate a memory management unit other examples include shapeshifter by the same developer that created sheepshaver fusion pearpc and ifusion the latter ran classic mac os with a powerpc coprocessor accelerator card using this method has been said to equal or better the speed of a macintosh with the same processor especially with respect to the 68k series due to real macs running in mmu trap mode hampering performance citation needed apple s initial version of rosetta is a powerpc emulator allowing intel based macs to run powerpc mac os x applications but is unable to run non carbon classic mac os 9 2 2 or earlier applications 51 rosetta was available for all intel releases of os x until version 10 7 lion timeline edit timeline of mac operating systems v t e see also edit list of apple operating systems comparison of operating systems history of the graphical user interface inside macintosh apple computer inc v microsoft corp list of classic mac os software notes edit the retronym classic mac os was coined after the introduction of mac os x references edit 1 2 3 linzmayer owen w 2004 apple confidential 2 0 no starch press archived from the original on november 13 2016 retrieved september 23 2016 1 2 the macintosh product introduction plan stanford university libraries academic information resources archived from the original on july 21 2010 mac os 9 2 2 document and software apple computer december 5 2001 archived from the original on april 21 2006 retrieved september 25 2016 morgenstern david useful command line tips for programmers and mac managers zdnet archived from the original on july 28 2020 retrieved october 13 2019 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 macintosh system software version history apple computer august 7 2001 archived from the original on march 10 2014 retrieved september 25 2016 gruman galen november 1997 why apple pulled the plug macworld vol 14 no 11 pp 31 36 1 2 october 23 1999 mac os 9 released applematters com archived from the original on october 28 2009 retrieved november 28 2009 hertzfeld andy folklore org the original macintosh mea culpa archived from the original on june 19 2010 retrieved may 10 2010 a brief history of the classic mac os low end mac july 26 2012 archived from the original on october 5 2016 retrieved september 23 2016 mike tuck august 12 2001 the real history of the gui archived from the original on january 3 2022 retrieved july 23 2020 bruce horn on xerox apple and progress archived from the original on august 26 2009 retrieved september 1 2009 folklore org we re not hackers www folklore org archived from the original on september 27 2016 retrieved september 26 2016 icônes by susan kare micg musée de l imprimerie et de la communication graphique retrieved august 6 2025 pirouette turning points in design the museum of modern art retrieved august 4 2025 nasa worm as art museum of modern art opens exhibition featuring nasa worm nasa january 23 2025 retrieved august 4 2025 feeney mark july 23 2025 at moma designs for living the boston globe retrieved august 4 2025 cite web cs1 maint deprecated archival service link susan kare moma the museum of modern art retrieved august 4 2025 system 7 5 and mac os 7 6 the beginning and end of an era june 27 2014 archived from the original on september 24 2016 retrieved september 23 2016 mac os 7 6 deserves some special mention the most obvious difference is the name change this was for the mac clone manufacturers who weren t making macintoshes but mac os computers new mac os extended format hfs available apple developer news 1997 archived from the original on may 12 2008 retrieved march 28 2007 goodin sue wilson dave programming the new 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