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|A version of the Classic Mac OS operating system|
Screenshot of Mac OS 8.1
|July 26, 1997; 20 years ago (1997-07-26)|
|8.6 / May 10, 1999; 18 years ago (1999-05-10)|
|Mac OS 9|
|Apple - Products - Mac OS 8.6 at the Wayback Machine (archived September 22, 1999)|
|Unsupported as of May 2001|
Mac OS 8 is an operating system that was released by Apple Computer on July 26, 1997. It represented the largest overhaul of the classic Mac OS since the release of System 7, some six years before. It put more emphasis on color than prior operating systems. Released over a series of updates, Mac OS 8 was an effort to integrate many of the technologies developed for Apple's overly-ambitious OS named Copland. Mac OS 8 helped modernize the Mac OS while Apple developed its next generation operating system, Mac OS X. Mac OS 8 is one of Apple's most successful software releases, selling over 1.2 million copies in the first two weeks. Coming as it did at a difficult time in Apple's history, many pirate groups refused to traffic in the new OS, encouraging people to buy it instead.
Mac OS 8.0 brought about the most visible changes in the line-up, including the introduction of the Platinum interface and a native PowerPC multithreaded Finder. Mac OS 8.1 introduced a new, more efficient file system named HFS Plus. Mac OS 8.5 was the first version of the Mac OS to require a PowerPC processor. It featured PowerPC native versions of QuickDraw, AppleScript, and the Sherlock search utility. Its successor, Mac OS 9, was released on October 23, 1999.
Apple's next generation operating system, which it originally envisioned as "System 8" was codenamed Copland. It was announced in March 1994 alongside the introduction of the first PowerPC Macs. Apple intended Copland as a fully native PowerPC system offering intelligent agents, a microkernel, a customizable interface named Appearance Manager, a hardware abstraction layer, and a relational database integrated into the Finder. Copland was to be followed by Gershwin, which promised memory protection spaces and full preemptive multitasking. The system was intended to be a full rewrite of the Mac OS, and Apple hoped to beat Microsoft Windows 95 to market with a development cycle of only one year.
The Copland development was hampered by many missed deadlines. The release date was first pushed back to the end of 1995, then to mid-'96, late '96, and finally to the end of 1997. With a dedicated team of 500 software engineers and an annual budget of $250 million, Apple executives began to grow impatient with the project continually falling behind schedule. At the Worldwide Developers Conference in January 1997, Apple chief executive officer (CEO) Gil Amelio announced that, rather than release Copland as one monolithic release, Copland features would be phased into the Mac OS following a six-month release cycle. These updates began with Mac OS 7.6, released during WWDC. Mac OS 8.0, released six months later, continued to integrate Copland technologies into the Mac OS.
In August 1996, Apple chief technology officer Ellen Hancock froze development of Copland and Apple began a search for an operating system developed outside the company. This ultimately led to Apple buying NeXT and developing Mac OS X.
Mac OS 8.0
Developed under the codename "Tempo", Mac OS 8.0 was released on July 26, 1997. Initially, the early beta releases of the product which were circulated to developers and Apple internal audiences, were branded as Mac OS 7.7, superseding the then-current release, Mac OS 7.6. Afterward, the software was later renamed Mac OS 8 before final release.
Other features introduced in Mac OS 8.0 include the following:
Mac OS 8.1
Released on January 19, 1998, Mac OS 8.1 was the last version of the Mac OS to run on Motorola 68000 series processors. It addressed performance and reliability improvements. It introduced a new file system named HFS+, also named Mac OS Extended, which supported large file sizes and made more efficient use of larger hard drives via using a smaller block size. To upgrade, users must reformat the hard drive, which deletes the entire contents of the drive. Some third-party utilities later appeared that preserved the user's data while upgrading to HFS+. The 68040 systems do not support booting from HFS+ disks; the boot drive must be HFS.
Mac OS 8.1 also included an enhanced version of PC Exchange, allowing Macintosh users to see the long file names (up to 255 characters) on files that were created on PCs running Microsoft Windows, and supporting File Allocation Table (FAT) 32.
Mac OS 8.1 is the earliest version of the Mac OS that can run Carbon applications. Carbon support requires a PowerPC processor and installation of the CarbonLib software from Apple's website; it is not a standard component of Mac OS 8.1. Applications needing later versions of CarbonLib will not run on Mac OS 8.1. More recent versions of CarbonLib require Mac OS 8.6.
Mac OS 8.1 was free for Mac OS 8 owners and was available in February 1998 via the apple.com website.
Mac OS 8.5
Released October 17, 1998, Mac OS 8.5 was the first version of the Mac OS to run solely on Macs equipped with a PowerPC processor. If Mac OS 8.5 is installed on a 68k system, the Sad Mac error screen will appear. As such, it replaced some but not all of the 680x0 code with PowerPC code, improving system performance by relying less on 680x0 emulation.
It introduced the Sherlock search utility. This allowed users to search the contents of documents on hard drives (if the user had let it index the drive), or extend a search to the Internet. Sherlock plug-ins started appearing at this time; these allowed users to search the contents of other websites.
Mac OS 8.5 included several performance improvements. Copying files over a network was faster than prior versions and Apple advertised it as being "faster than Windows NT". AppleScript was also rewritten to use only PowerPC code, which improved AppleScript execution speed significantly.
Font Smoothing, system-wide antialiasing for type was also introduced.
The HTML format for online help, first adopted by the Finder's Info Center in Mac OS 8, was now used throughout. This made it easier for software companies to write online help systems.
In this release, the PPP control panel was removed and replaced with Remote Access, which provides the same functionality but also allows connections to AppleTalk Remote Access (ARA) servers.
The installation process was simplified considerably in Mac OS 8.5. In earlier versions the installer worked in segments and often required a user to click to continue in between stages of the installation. This was a holdover from the days when the OS was distributed on multiple floppy disks, disk swapping promoting a natural segmentation model. The Mac OS 8.5 installer generally required very little user interaction once it was started. Customisation options were also much more detailed yet simpler to manage.
From Mac OS 8.5 onward, MacLinkPlus document translation software is no longer bundled as part of the Mac OS.
Mac OS 8.5 was the first version of the Mac OS to support themes, or skins, which could change the default Apple Platinum look of the Mac OS to "Gizmo" or "HiTech" themes. This radical changing of the computer's appearance was removed at the last minute, and appeared only in beta versions, though users could still make (and share) their own themes and use them with the OS. The Appearance control panel was also updated to support proportional scroll bars, and added the option for both scroll arrows to be placed at the bottom of a scroll bar.
Along with themes support, 8.5 was the first version to support 32-bit icons. Icons now had 24-bit color (16.7 million colors) and an 8-bit alpha channel, allowing for transparency-translucency effects.
The application palette made its debut with 8.5 – the application menu at the right side of the menu bar could be resized to show the active application's name, or 'torn off' into a palette of buttons. This palette could be customized many ways, by removing the window frame and changing the size and layout of the buttons. Apple provided no user interface to set these options, instead making them available via AppleScript and Apple Events and relying on third parties to provide a user interface for the task. By setting it to display horizontally and turning off the window border, the palette could be configured to look and function much like the Windows 95 task bar.
Mac OS 8.5.1
Mac OS 8.5.1, released December 7, 1998, was a minor update to Mac OS 8.5 that fixed several bugs that were causing crashes and data corruption.
Mac OS 8.6
Released May 10, 1999, Mac OS 8.6 added support to the Mac OS nanokernel to handle preemptive tasks via the Multiprocessing Services 2.x and later developer API. This update improved PowerBook battery life and added Sherlock 2.1. This free update for Mac users running 8.5 and 8.5.1 was faster and much more stable than either versions of 8.5.x and was also the first Mac OS to have the OS version displayed as part of the startup screen. However, there was still no process separation; the system still used cooperative multitasking between processes, and even a process that was Multiprocessing Services-aware still had a portion that ran in the blue task, a task that also ran all programs that are unaware of it, and the only task that could run 68k code.
Versions of Mac OS 8
|8.0||July 26, 1997||Initial release||Power Macintosh G3||Tempo||99 USD|
|8.1||January 19, 1998||HFS+ file system||iMac (Bondi Blue) Rev A.||Bride of Buster||Free update|
|8.5||October 17, 1998||PowerPC required, Sherlock, Themes, 32-bit icons||Allegro||99 USD|
|8.5.1||December 7, 1998||Crash, memory leaks and data corruption fixes||iMac (5 flavors)||The Ric Ford (of Macintouch) Release||Free update|
|8.6||May 10, 1999||New nanokernel to support Multiprocessing Services 2.0, battery life improvement||iBook||Veronica|
|Yes: machine-specific version only||Yes||Yes|
|No||No||Yes: machine-specific version only|
|Yes: machine-specific version only||Yes|
|No||Yes: machine-specific version only|
|No||Yes: machine-specific version only|
- Technical Note TN1102: Mac OS 8 at the Wayback Machine (archived February 22, 2004) from apple.com
- Technical Note TN1121: Mac OS 8.1 at the Wayback Machine (archived April 10, 2004) from apple.com
- Technical Note TN1142: Mac OS 8.5 at the Wayback Machine (archived August 21, 2004) from apple.com
- Technical Note TN1163: Mac OS 8.6 at the Wayback Machine (archived June 19, 2004) from apple.com
- Mac OS 8 Hardware Compatibility
|Mac OS 8
Mac OS 9