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Wednesday, April 24, 2019

NeXT

From Wikipedia, the free encyclopedia

NeXT, Inc.
Private
Industry
FateMerged into Apple
FoundedJune 20, 1985
FounderSteve Jobs
DefunctFebruary 7, 1997
Headquarters ,
U.S.
Key people
Products
Number of employees
540 (1992)
Websitenext.com (archived)

NeXT, Inc. (later NeXT Computer, Inc. and NeXT Software, Inc.) was an American computer and software company founded in 1985 by Apple Computer co-founder Steve Jobs. Its name was usually pronounced as "Next". Based in Redwood City, California, the company developed and manufactured a series of computer workstations intended for the higher education and business markets. NeXT was founded by Jobs after he was fired from Apple, along with several co-workers. NeXT introduced the first NeXT Computer in 1988, and the smaller NeXTstation in 1990. The NeXT computers experienced relatively limited sales, with estimates of about 50,000 units shipped in total. Nevertheless, their innovative object-oriented NeXTSTEP operating system and development environment (Interface Builder) were highly influential.

The first major outside investment was from Ross Perot, who invested after seeing a segment about NeXT on The Entrepreneurs. In 1987, he invested $20 million in exchange for 16 percent of NeXT's stock and subsequently joined the board of directors in 1988.

NeXT later released much of the NeXTSTEP system as a programming environment standard called OpenStep. NeXT withdrew from the hardware business in 1993 to concentrate on marketing OPENSTEP for Mach, its own OpenStep implementation, for several original equipment manufacturers (OEMs). NeXT also developed WebObjects, one of the first enterprise web application frameworks. WebObjects never became very popular because of its initial high price of $50,000, but it remains a prominent early example of a Web server based on dynamic page generation rather than on static content.

Apple purchased NeXT in 1997 for $429 million (equivalent to $670 million in 2018), and 1.5 million shares of Apple stock. As part of the agreement, Steve Jobs, Chairman and CEO of NeXT Software, returned to Apple, the company he co-founded in 1976. The founder promised to merge software from NeXT with Apple's hardware platforms, eventually resulting in macOS, iOS, watchOS, and tvOS. These operating systems are completely based upon the NeXTSTEP and OPENSTEP foundation.

History

Background

In 1985, Apple co-founder Steve Jobs led Apple's SuperMicro division, which was responsible for the development of the Macintosh and Lisa personal computers. The Macintosh had been successful on university campuses partly because of the Apple University Consortium, which allowed students and institutions to buy the computers at a discount. The consortium had earned more than $50 million on computers by February 1984.

While chairman, Jobs visited university departments and faculty members to sell Macintosh. Jobs met Paul Berg, a Nobel Laureate in chemistry, at a luncheon held in Silicon Valley to honor François Mitterrand, then President of France. Berg was frustrated by the expense of teaching students about recombinant DNA from textbooks instead of in wet laboratories, used for the testing and analysis of chemicals, drugs, and other materials or biological matter. Wet labs were prohibitively expensive for lower-level courses and were too complex to be simulated on personal computers of the time. Berg suggested to Jobs to use his influence at Apple to create a "3M computer" workstation for higher education, featuring at least one megabyte of random-access memory (RAM), a megapixel display and megaFLOPs performance, hence the name "3M". 

Jobs was intrigued by Berg's concept of a workstation and contemplated starting a higher education computer company in the fall of 1985, amidst increasing turmoil at Apple. Jobs' division did not release upgraded versions of the Macintosh and much of the Macintosh Office system. As a result, sales plummeted, and Apple was forced to write off millions of dollars in unsold inventory. Apple's chief executive officer (CEO) John Sculley ousted Jobs from his day-to-day role at Apple, replacing him with Jean-Louis Gassée in 1985. Later that year, Jobs began a power struggle to regain control of the company. The board of directors sided with Sculley while Jobs took a business visit to Western Europe and the Soviet Union on behalf of Apple.

Original NeXT team

After several months of being sidelined, Jobs resigned from Apple on September 13, 1985. He told the board he was leaving to set up a new computer company, and that he would be taking several Apple employees from the SuperMicro division with him. He also told the board that his new company would not compete with Apple and might even consider licensing its designs back to them to market under the Macintosh brand.

Jobs named his new company Next, Inc. A number of former Apple employees followed him to Next, including Joanna Hoffman, Bud Tribble, George Crow, Rich Page, Susan Barnes, Susan Kare, and Dan'l Lewin. After consulting with major educational buyers from around the country, including a follow-up meeting with Paul Berg, a tentative specification for the workstation was drawn up. It was designed to be powerful enough to run wet lab simulations and cheap enough for college students to use in their dormitory rooms. Before the specifications were finished, however, Apple sued Next for "nefarious schemes" to take advantage of the cofounders' insider information. Jobs remarked, "It is hard to think that a $2 billion company with 4,300-plus people couldn't compete with six people in blue jeans." The suit was eventually dismissed before trial. 

In 1986, Jobs recruited the famous graphic designer Paul Rand to create a brand identity costing $100,000. Jobs recalled, "I asked him if he would come up with a few options, and he said, 'No, I will solve your problem for you and you will pay me. You don’t have to use the solution. If you want options go talk to other people.'" Rand created a 20-page brochure detailing the brand, including the precise angle used for the logo (28°) and a new company name spelling, NeXT.

1987–93: NeXT Computer

First generation

This original NeXT Computer was used by Tim Berners-Lee at CERN, and became the world's first Web server and ran the world's first Web browser in 1990
I want some kid at Stanford to be able to cure cancer in his dorm room. Steve Jobs, on the purpose of the new NeXT cube
NeXT changed its business plan in mid-1986. The company decided to develop both computer hardware and software, instead of just a low-end workstation. A team led by Avie Tevanian, who had joined the company after working as one of the Mach kernel engineers at Carnegie Mellon University, was to develop the NeXTSTEP operating system. The hardware division, led by Rich Page — one of the cofounders who had previously led the Apple Lisa team — designed and developed the hardware. NeXT's first factory was completed in Fremont, California in 1987. It was capable of producing 150,000 machines per year. NeXT's first workstation was officially named the NeXT Computer, although it was widely termed "the cube" because of its distinctive case, a 1 ft magnesium cube, designed by Apple IIc case designer Frogdesign in accordance with an edict from Jobs.

The original design team had anticipated releasing the computer for US$3,000 in spring of 1987 to be ready for sale by summer of that year. The NeXT Computer received standing ovations when revealed at a lavish, invitation-only gala event, "NeXT Introduction — the Introduction to the NeXT Generation of Computers for Education" at the Louise M. Davies Symphony Hall, San Francisco, California on Wednesday October 12, 1988. The following day, selected educators and software developers were invited (for $100 registration fee) to attend the first public technical overview of the NeXT computer at an event called "The NeXT Day" held at the San Francisco Hilton. This event gave developers interested in developing NeXT software an insight into the software architecture, object-oriented programming and developing for the NeXT Computer. The luncheon speaker was Steve Jobs. 

The first machines were tested in 1989, after which NeXT started selling limited numbers to universities with a beta version of the NeXTSTEP operating system installed. Initially the NeXT Computer was targeted at U.S. higher education establishments only, with a base price of $6,500. The machine was widely reviewed in magazines, generally concentrating on the hardware. When asked if he was upset that the computer's debut was delayed by several months, Jobs responded, "Late? This computer is five years ahead of its time!"

The NeXT Computer was based on the new 25 MHz Motorola 68030 central processing unit (CPU). The Motorola 88000 RISC chip was originally considered, but was not available in sufficient quantities. It included between 8 and 64 MB of random-access memory (RAM), a 256 MB magneto-optical (MO) drive, a 40 MB (swap-only), 330 MB, or 660 MB hard disk drive, 10BASE2 Ethernet, NuBus and a 17-inch MegaPixel grayscale display measuring 1120 by 832 pixels. In 1989 a typical new PC, Macintosh, or Amiga computer included a few megabytes of RAM, a 640×480 16-color or 320x240 4000-color display, a 10 to 20 megabyte hard drive and few networking capabilities. It also was the first computer to ship with a general-purpose DSP chip (Motorola 56001) on the motherboard. This was used to support sophisticated music and sound processing, including the Music Kit software. 

The magneto-optical drive manufactured by Canon Inc. was used as the primary mass storage device. These drives were relatively new to the market, and the NeXT was the first computer to use them. They were cheaper than hard drives (blank media especially so: though each had a cost of $150 to Canon, Jobs's typically forthright negotiations saw Canon agree to a retail of only $50 apiece) but slower (with an average seek time of 96 ms). The design made it impossible to move files between computers without a network, since each NeXT Computer had only one MO drive and the disk could not be removed without shutting down the system. Storage options proved challenging for the first NeXT Computers. The magneto-optical media was relatively expensive and had performance and reliability problems despite being faster than a floppy drive. The drive was not sufficient to run as the primary medium running the NeXTSTEP operating system both in terms of speed or capacity.

In 1989, NeXT struck a deal for former Compaq reseller Businessland to sell NeXT computers in select markets nationwide. Selling through a retailer was a major change from NeXT's original business model of only selling directly to students and educational institutions. Businessland founder David Norman predicted that sales of the NeXT Computer would surpass sales of Compaq computers after 12 months.

In 1989, Canon invested US$100 million in NeXT, giving it a 16.67 percent stake, making NeXT worth almost $600 million. Canon invested in NeXT with the condition that it would be able to use the NeXTSTEP environment with its own workstations, which would mean a greatly expanded market for the software. After NeXT exited the hardware business, Canon produced a line of PCs, called object.station, including models 31, 41, 50 and 52, specifically designed to run NeXTSTEP/Intel. Canon also served as NeXT's distributor in Japan.

NeXT computers were first released on the retail market in 1990, for $9,999. NeXT's original investor Ross Perot resigned from the board of directors in June 1991 to dedicate more time to Perot Systems, a Plano, Texas-based systems integrator.

Second generation

A NeXTstation with the original keyboard, mouse and the NeXT MegaPixel monitor
 
NeXT released a second generation of workstations in 1990. The new range included a revised NeXT Computer, renamed the NeXTcube, and the NeXTstation, nicknamed "the slab," which used a "pizza box" case form-factor. Jobs was explicit in ensuring NeXT staff did not use the latter terminology, lest the NeXT machines be compared to competing Sun workstations. The magneto-optical drive was replaced with a 2.88 MB floppy drive to offer users a way to use their floppy disks. However, individual 2.88 MB floppies were expensive and the technology did not supplant the 1.44 MB floppy. Realizing this, NeXT utilized the CD-ROM drive, which eventually became an industry standard for storage. Color graphics were available on the NeXTstation Color and the NeXTdimension graphics processor hardware for the NeXTcube. The new computers were cheaper and faster than their predecessors, with the new Motorola 68040 processor. 

In 1992, NeXT launched "Turbo" variants of the NeXTcube and NeXTstation with a 33 MHz 68040 processor and maximum RAM capacity increased to 128 MB. NeXT sold 20,000 computers in 1992 (NeXT counted upgraded motherboards on back order as sales) — a small number compared with their competitors. However, the company reported sales of $140 million for the year, encouraging Canon to invest a further $30 million to keep the company afloat.
In its existence, Next has sold a total of 50,000 copies of Nextstep, says Jobs. It's not much of an installed base, so he predicts the company will ship 50,000 Nextstep packages in 1993. But Next needs to increase its volume three-fold in order to build enough momentum to forestall Microsoft and Taligent in the object-oriented software business. UnixWorld, April 1993
In total, 50,000 NeXT machines were sold, including thousands to the then super secret National Reconnaissance Office located in Chantilly, Virginia. NeXT's long-term aim was to migrate to the RISC (Reduced Instruction Set Computing) architecture, a processor design strategy intended to increase performance. The project was known as the NeXT RISC Workstation (NRW). Initially the NRW was to be based on the Motorola 88110 processor, but due to a lack of confidence in Motorola's commitment to the 88000-series architecture, it was later redesigned around dual PowerPC 601s. NeXT produced some motherboards and enclosures, but exited the hardware business before full production.

Software applications

NeXT computers were delivered with Mathematica pre-installed. Several developers used the NeXT platform to write pioneering programs. Tim Berners-Lee used a NeXT Computer in 1990 to create the first Web browser and Web server; accordingly, NeXT was instrumental in the development of the World Wide Web.

NeXT was an engineering computer used by professors for the most serious science challenges, and also for developing finished newspaper layouts using News running on Next. George Mason University in the early 1990s had a set of them for publishing, as well as Silicon Graphics for CAD/GL and Mathematica for astrophysics. The games Doom, Doom II: Hell on Earth and Quake were developed by id Software on NeXT machines. Other games based on the Doom engine, such as Heretic and Hexen: Beyond Heretic by Raven Software, as well as Strife by Rogue Entertainment were also developed on NeXT hardware using id's tools.

Other commercial programs were released for NeXT computers, including Altsys Virtuoso, a vector drawing program with page-layout features which was ported to Mac OS and Microsoft Windows as Aldus FreeHand v4, and the Lotus Improv spreadsheet program. The systems also came with a number of smaller built-in applications, such as the Merriam-Webster Collegiate Dictionary, Oxford Quotations, the complete works of William Shakespeare, and the Digital Librarian search engine to access them.

1993–96: NeXT Software

NeXTSTEP, the operating system used by the NeXTcube and NeXTstation
 
NeXT started porting the NeXTSTEP operating system to IBM PC compatible computers using the Intel 80486 processor in late 1991. The operating system was ported to Intel's architecture because of a change in NeXT's business strategy, which was then to remove themselves from the hardware business entirely. A demonstration of the port was displayed at the NeXTWorld Expo in January 1992. By mid-1993 the product was complete and version 3.1, also known as NeXTSTEP 486, was released. Prior to the release of NeXTSTEP, Chrysler planned to buy 3,000 copies in 1992.

NeXTSTEP 3.x was later ported to PA-RISC and SPARC-based platforms, for a total of four versions: NeXTSTEP/NeXT (for NeXT's 68k "black boxes"), NeXTSTEP/Intel, NeXTSTEP/PA-RISC and NeXTSTEP/SPARC. Although these ports were not widely used, NeXTSTEP gained popularity at institutions such as First Chicago NBD, Swiss Bank Corporation, O'Connor and Company, and other organizations owing to its programming model. It was also used by many American federal agencies, such as United States Naval Research Laboratory, the National Security Agency, the Advanced Research Projects Agency, the Central Intelligence Agency and the National Reconnaissance Office. Some IBM PC clone vendors offered somewhat customized hardware solutions that were delivered running NeXTSTEP on Intel, such as the Elonex NextStation and the Canon object.station 41.

NeXT withdrew from the hardware business in 1993 and the company was renamed NeXT Software Inc; consequently, 300 of the 540 staff employees were laid off. NeXT negotiated to sell the hardware business, including the Fremont factory, to Canon. Canon later pulled out of the deal. Work on the PowerPC machines was stopped, along with all hardware production. CEO of Sun Microsystems Scott McNealy announced plans to invest $10 million in 1993 and use NeXT software (OpenStep) in future Sun systems. NeXT partnered with Sun to create OpenStep which was NeXTSTEP without the Mach-based kernel. 

After dropping the hardware business, NeXT returned to selling a toolkit to run on other operating systems, in effect returning to the original business plan. New products based on OpenStep were released, including OpenStep Enterprise, a version for Microsoft's Windows NT. The company also launched WebObjects, a platform for building large-scale dynamic web applications. Many large businesses including Dell, Disney, WorldCom, and the BBC used this WebObjects software for a short time. Eventually WebObjects was used solely to power Apple's iTunes Store and most of its corporate Web site, though it is no longer in use.

1996–97: purchase by Apple

We went for one of our, you know, signature Steve Jobs walks around Palo Alto, and ... we happened to see someone who was in that meeting from the [Apple] management team who said, 'You guys won easily, no problem. You have nothing to worry about.' Avie Tevanian, presenting NeXT versus Be to Apple
Apple Computer announced an intention to acquire NeXT on December 20, 1996. Apple paid $429 million in cash, which went to the initial investors and 1.5 million Apple shares, which went to Steve Jobs, who was deliberately not given cash for his part in the deal. The main purpose of the acquisition was to use NeXTSTEP as a foundation to replace the dated classic Mac OS, instead of BeOS or the in-development Copland. The deal was finalized on February 7, 1997, bringing Jobs back to Apple as a consultant, who was later appointed as interim CEO. In 2000, Jobs took the CEO position as a permanent assignment, holding the position until his resignation on August 24, 2011; Jobs died six weeks later on October 5, 2011 from complications of a relapsed pancreatic neuroendocrine tumor.

Several NeXT executives replaced their Apple counterparts when Steve Jobs restructured the company's board of directors. Over the next five years the NeXTSTEP operating system was ported to the PowerPC architecture. At the same time, an Intel port and OpenStep Enterprise toolkit for Windows were both produced. The operating system was code named Rhapsody, while the toolkit for development on all platforms was called "Yellow Box". For backwards compatibility Apple added the "Blue Box" to Rhapsody, allowing existing Mac applications to be run in a self-contained cooperative multitasking environment.

A server version of the new operating system was released as Mac OS X Server 1.0 in 1999, and the first consumer version, Mac OS X 10.0, in 2001. The OpenStep developer toolkit was renamed Cocoa. Rhapsody's Blue Box was renamed Classic Environment and changed to run applications full-screen without requiring a separate window. Apple included an updated version of the original Macintosh toolbox, called Carbon, that gave existing Mac applications access to the environment without the constraints of Blue Box. Some of NeXTSTEP's interface features were used in Mac OS X, including the Dock, the Services menu, the Finder's "Column" view, and the Cocoa text system.

NeXTSTEP's processor-independent capabilities were retained in Mac OS X, leading to both PowerPC and Intel x86 versions (although only PowerPC versions were publicly available before 2006). Apple moved to Intel processors by August 2006.

Corporate culture and community

Jobs created a different corporate culture at NeXT in terms of facilities, salaries, and benefits. Jobs had experimented with some structural changes at Apple but at NeXT he abandoned conventional corporate structures, instead making a "community" with "members" instead of employees. There were only two different salaries at NeXT until the early 1990s. Team members who joined before 1986 were paid $75,000 while those who joined afterwards were paid $50,000. This caused a few awkward situations where managers were paid less than their employees. Employees were given performance reviews and raises every six months because of the spartan salary plans. To foster openness, all employees had full access to the payrolls, although few employees ever took advantage of the privilege. NeXT's health insurance plan offered benefits to not only married couples but unmarried couples and same-sex couples, although the latter privilege was later withdrawn due to insurance complications. The payroll schedule was also very different from other companies in Silicon Valley at the time: instead of getting paid twice a month in arrears (that is, at the end of the pay period), employees would get paid once a month in advance (at its beginning, in other words).

Jobs found office space in Palo Alto, California on 3475 Deer Creek Road, occupying a glass and concrete building which featured a staircase designed by architect I. M. Pei. The first floor used hardwood flooring and large worktables where the workstations would be assembled. To avoid inventory errors, NeXT used the just-in-time (JIT) inventory strategy. The company contracted out for all major components such as mainboards and cases and had the finished components shipped to the first floor for assembly. The second floor was the office space with an open floor plan. The only enclosed rooms were Jobs's office and a few conference rooms.

As NeXT expanded, more office space was needed. The company rented an office at 800 and 900 Chesapeake Drive in Redwood City, also designed by Pei. The architectural centerpiece was a "floating" staircase with no visible supports. The open floor plan was retained, although furnishings became luxurious, with $5,000 chairs, $10,000 sofas and Ansel Adams prints.

NeXT's first former campus in Palo Alto was subsequently occupied by SAP AG. Its second former campus in Redwood City was occupied by ApniCure and OncoMed Pharmaceuticals Inc. 

The first issue of NeXTWORLD magazine was printed in 1991. It was published in San Francisco by Integrated Media and edited by Michael Miley and later Dan Ruby. It was the only mainstream periodical to discuss NeXT computers, the operating system, and NeXT software. The publication was discontinued in 1994 after only four volumes. A NeXTWORLD Expo followed as a developer conference, held in 1991 and 1992 at the San Francisco Civic Center and in 1993 and 1994 at the Moscone Center in San Francisco, with Steve Jobs as the keynote speaker.

Influence on the computer industry

Though not very profitable, the company had a wide-ranging impact on the computer industry. Object-oriented programming and graphical user interfaces became more common after the 1988 release of the NeXTcube and NeXTSTEP. The technologically successful platform was often held as the trendsetter when other companies started to emulate the success of NeXT's object-oriented system.

Microsoft announced the Cairo project in 1991; the Cairo specification included similar object-oriented user interface features for a coming consumer version of Windows NT. Although the project was ultimately abandoned, some elements were integrated into other projects. By 1994, Microsoft and NeXT were collaborating on a Windows NT port of OpenStep; the port, however, was never released.

By 1993, Taligent was considered by the press to be a competitor in objects and operating systems even without any product release, with NeXT being a main point of comparison. For the first few years, Taligent's theoretical newness was often compared to NeXT's older but mature and commercially established platform, but Taligent's debut release in 1995 was called "too little, too late" especially compared to NeXT.

WebObjects failed to achieve wide popularity partly because of the initial high price of US$50,000, but it remains the first and most prominent early example of a web application server that enabled dynamic page generation based on user interactions as opposed to static content. WebObjects is now bundled with macOS Server and Xcode.

Macintosh operating systems

From Wikipedia, the free encyclopedia

The original Macintosh System Software and Finder, released in 1984
 
The family of Macintosh operating systems developed by Apple Inc. includes the graphical user interface-based operating systems it has designed for use with its Macintosh series of personal computers since 1984, as well as the related system software it once created for compatible third-party systems. 

In 1984, Apple debuted the operating system that is now known as the "Classic" Mac OS with its release of the original Macintosh System Software. The system, rebranded "Mac OS" in 1996, was preinstalled on every Macintosh until 2002 and offered on Macintosh clones for a short time in the 1990s. Noted for its ease of use, it was also criticized for its lack of modern technologies compared to its competitors.

The current Mac operating system is macOS, originally named "Mac OS X" until 2012 and then "OS X" until 2016. Developed between 1997 and 2001 after Apple's purchase of NeXT, Mac OS X brought an entirely new architecture based on NeXTSTEP, a Unix system, that eliminated many of the technical challenges that the classic Mac OS faced. The current macOS is preinstalled with every Mac and is updated annually. It is the basis of Apple's current system software for its other devices, iOS, watchOS, and tvOS.

Prior to the introduction of Mac OS X, Apple experimented with several other concepts, releasing different products designed to bring the Macintosh interface or applications to Unix-like systems or vice versa, A/UX, MAE, and MkLinux. Apple's effort to expand upon and develop a replacement for its classic Mac OS in the 1990s led to a few cancelled projects, code named Star Trek, Taligent, and Copland

Although they have different architectures, the Macintosh operating systems share a common set of GUI principles, including a menu bar across the top of the screen; the Finder shell, featuring a desktop metaphor that represents files and applications using icons and relates concepts like directories and file deletion to real-world objects like folders and a trash can; and overlapping windows for multitasking.

Classic Mac OS

Mac OS 9, released in 1999
 
The "classic" Mac OS is the original Macintosh operating system that was introduced in 1984 alongside the first Macintosh and remained in primary use on Macs through 2001.

Apple released the original Macintosh on January 24, 1984; its early system software was partially based on the Lisa OS and the Xerox PARC Alto computer, which former Apple CEO Steve Jobs previewed. It was originally named "System Software", or simply "System"; Apple rebranded it as "Mac OS" in 1996 due in part to its Macintosh clone program that ended a year later.

Classic Mac OS is characterized by its monolithic design. Initial versions of the System Software run one application at a time. System 5 introduced cooperative multitasking. System 7 supports 32-bit memory addressing and virtual memory, allowing larger programs. Later updates to the System 7 enable the transition to the PowerPC architecture. The system was considered user-friendly, but its architectural limitations were critiqued, such as limited memory management, lack of protected memory and access controls, and susceptibility to conflicts among extensions.

Releases

Nine major versions of the classic Mac OS were released. The name "Classic" that now signifies the system as a whole is a reference to a compatibility layer that helped ease the transition to Mac OS X.

Mac OS X / OS X / macOS

macOS Mojave, released in 2018
 
macOS (originally named "Mac OS X" until 2012 and then "OS X" until 2016) is the current Mac operating system that officially succeeded the classic Mac OS in 2001. 

Although the system was originally marketed as simply "version 10" of Mac OS, it has a history that is largely independent of the classic Mac OS. It is a Unix-based operating system built on NeXTSTEP and other technology developed at NeXT from the late 1980s until early 1997, when Apple purchased the company and its CEO Steve Jobs returned to Apple. Precursors to the original release of Mac OS X include OpenStep, Apple's Rhapsody project, and the Mac OS X Public Beta

macOS makes use of the BSD codebase and the XNU kernel, and its core set of components is based upon Apple's open source Darwin operating system.

Releases

Desktop

The first desktop version of the system was released on March 24, 2001, supporting the Aqua user interface. Since then, several more versions adding newer features and technologies have been released. Since 2011, new releases have been offered on an annual basis.
  • Mac OS X 10.0 – code name "Cheetah", released to end users on Saturday, March 24, 2001
  • Mac OS X 10.1 – code name "Puma", released to end users on Tuesday, September 25, 2001
  • Mac OS X 10.2 – also marketed as "Jaguar", released to end users on Friday, August 23, 2002
  • Mac OS X Panther – version 10.3, released to end users on Friday, October 24, 2003
  • Mac OS X Tiger – version 10.4, released to end users on Friday, April 29, 2005
  • Mac OS X Leopard – version 10.5, released to end users on Friday, October 26, 2007
  • Mac OS X Snow Leopard – version 10.6, publicly unveiled on Monday, June 8, 2009
  • Mac OS X Lion – version 10.7, released to end users on Wednesday, July 20, 2011
  • OS X Mountain Lion – version 10.8, released to end users on Wednesday, July 25, 2012
  • OS X Mavericks – version 10.9, released to end users on Tuesday, October 22, 2013
  • OS X Yosemite – version 10.10, released to end users on Thursday, October 16, 2014
  • OS X El Capitan – version 10.11, released to end users on Wednesday, September 30, 2015
  • macOS Sierra – version 10.12, released to end users on Tuesday, September 20, 2016
  • macOS High Sierra – version 10.13, released to end users on Monday, September 25, 2017
  • macOS Mojave – version 10.14, released to end users on Monday, September 24, 2018

Server

An early server computing version of the system was released in 1999 as a technology preview. It was followed by several more official server-based releases. Server functionality has instead been offered as an add-on for the desktop system since 2011.

Other projects

Shipped

A/ROSE

The Apple Real-time Operating System Environment (A/ROSE) was a small embedded operating system which ran on the Macintosh Coprocessor Platform, an expansion card for the Macintosh. The idea was to offer a single "overdesigned" hardware platform on which third-party vendors could build practically any product, reducing the otherwise heavy workload of developing a NuBus-based expansion card. The first version of the system was ready for use in February 1988.

A/UX

In 1988, Apple released its first Unix-based OS, A/UX, which was a Unix operating system with the Mac OS look and feel. It was not very competitive for its time, due in part to the crowded Unix market and Macintosh hardware lacking high-end design features present on workstation-class computers. A/UX had most of its success in sales to the U.S. government, where POSIX compliance was a requirement that Mac OS could not meet.

MAE

The Macintosh Application Environment (MAE) was a software package introduced by Apple in 1994 that allowed users of certain Unix-based computer workstations to run Apple Macintosh application software. MAE used the X Window System to emulate a Macintosh Finder-style graphical user interface. The last version, MAE 3.0, was compatible with System 7.5.3. MAE was available for Sun Microsystems SPARCstation and Hewlett-Packard systems. It was discontinued on May 14, 1998.

MkLinux

Announced at the 1996 Worldwide Developers Conference (WWDC), MkLinux is an open source operating system that was started by the OSF Research Institute and Apple in February 1996 to port Linux to the PowerPC platform, and thus Macintosh computers. In the summer of 1998, the community-led MkLinux Developers Association took over development of the operating system. MkLinux is short for "Microkernel Linux," which refers to the project's adaptation of the Linux kernel to run as a server hosted atop the Mach microkernel. MkLinux is based on version 3.0 of Mach.

Cancelled

Star Trek

Star Trek (as in "to boldly go where no Mac has gone before") was a relatively unknown secret prototype beginning in 1992, whose goal was to create a version of the classic Mac OS that would run on Intel-compatible x86 personal computers. In partnership with Apple and with support from Intel, the project was instigated by Novell, which was looking to integrate its DR-DOS with the Mac OS GUI as a mutual response to the monopoly of Microsoft's Windows 3.0 and MS-DOS. A team consisting of four from Apple and four from Novell was able to get the Macintosh Finder and some basic applications such as QuickTime, running smoothly on the x86 architecture. The project was canceled a year later in early 1993, but some of the code was later reused when porting the Mac OS to PowerPC.

Taligent

Taligent (a portmanteau of "talent" and "intelligent") was the name of an object-oriented operating system and the company dedicated to producing it. Started as a project within Apple to provide a replacement for the classic Mac OS, it was later spun off into a joint venture with IBM as part of the AIM alliance, with the purpose of building a competing platform to Microsoft Cairo and NeXTSTEP. The development process never worked, and Taligent is often cited as an example of a project death march. Apple pulled out of the project in 1995 before the code had been delivered.

Copland

Copland was a project at Apple to create an updated version of the classic Mac OS. It was to have introduced protected memory, preemptive multitasking and a number of new underlying operating system features, yet still be compatible with existing Mac software. As originally planned, a follow-up release known as "Gershwin" would add multithreading and other advanced features. New features were added more rapidly than they could be completed, and the completion date slipped into the future with no sign of a release. In 1996, Apple decided to cancel the project outright and find a suitable third-party system to replace it. Copland development ended in August 1996, and in December 1996, Apple announced that it was buying NeXT for its NeXTSTEP operating system.

Timeline

Timeline of Macintosh operating systems
Apple–Intel architecturePower Mac G5Power Mac G4iMac G3Power MacintoshMacintosh QuadraMacintosh PortableMacintosh SE/30Macintosh IIMacintosh PlusMacintosh 128KA/UXA/UXA/UXmacOS MojavemacOS High SierramacOS SierraOS X El CapitanOS X YosemiteOS X MavericksOS X Mountain LionMac OS X LionMac OS X Snow LeopardMac OS X LeopardMac OS X TigerMac OS X PantherMac OS X 10.2Mac OS X 10.1Mac OS X 10.0Mac OS X Public BetaMac OS X Server 1.0MacWorks XLMacWorks XLSun RemarketingMacWorks XLMac OS 9Mac OS 9Mac OS 9Mac OS 8Mac OS 8Mac OS 8Mac OS 8System 7System 7System 7System 7System 6Classic Mac OSClassic Mac OSClassic Mac OSClassic Mac OSSystem 1Finder (software)Finder (software)Finder (software)Finder (software)Finder (software)Finder (software)Finder (software)Finder (software)

Related systems

Before the arrival of the Macintosh in 1984, Apple's history of operating systems began with its Apple II series computers in 1977, which ran Apple DOS, ProDOS, and later GS/OS; the Apple III in 1980, which ran Apple SOS; and the Apple Lisa in 1983, which ran Lisa OS and later MacWorks XL, a Macintosh emulator. Apple also developed the Newton OS for its Newton personal digital assistant from 1993 to 1997. 

In recent years, Apple has also launched several new operating systems based on the core of macOS, including iOS in 2007 for its iPhone, iPad, and iPod Touch mobile devices; watchOS in 2015 for the Apple Watch; tvOS in 2015 for the Apple TV set-top box; and audioOS for HomePod smart speakers.

Green development

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