The evolution of Mac OS X

Apple's desktop operating system, Mac OS X, has been the staple crop for its iMacs and MacBooks. Here we go back to where it all began in 2001.

The Evolution of Mac OS X [cover]
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Progression of OS X

More than 14 years ago, Apple unveiled its Mac OS X operating system, which became noteworthy for its UNIX architecture.

OS X has been known over the years for its simplicity, aesthetic interface, advanced technologies, applications, security and accessibility options. From the Finder to Spotlight, the Dock to iCloud, OS X has been integrated into Apple's hardware, as well as iOS devices, so users can easily work and navigate.

OS X has become a brand identity for both Apple and its Mac lineup and has broadly evolved over its 11 versions, even taking some of its shape from Apple's later launch of iOS, its mobile operating system.

Here's a look at the progression of OS X from its debut in 2001 to the current version that was released this week.

Also see: 8 tips and tricks for OS X El Capitan

The Evolution of Mac OS X [Cheetah]
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Cheetah

Apple's first major OS X release, known as Cheetah, was a radical change from the previous Mac OS 9, Apple's Classic Operating System. Announced at the 2000 Macworld Expo in San Francisco, Mac OS X 10.0 introduced the new Aqua User Interface, which showcased title bars with a brushed metal look, brightly colored buttons on windows and photo-realistic icons. OS X Cheetah also debuted the dock that still gives modern Macs their notable appearance. New apps were included as well, such as Mail, Address Book and TextEdit.

The Evolution of Mac OS X [Puma]
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Puma

OS X Puma was announced at the 2001 Macworld Expo in New York. It provided faster menu navigation and log-in as well as configurable options, such as a movable Dock and new system menus with controls for volume, battery life and AirPort access on the menu bar. iTunes was bundled with OS X 10.1 with CD burning capabilities, DVD playback and support for third-party digital cameras and MP3 players.

The Evolution of Mac OS X [Jaguar]
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Jaguar

While earlier versions of OS X did have jungle cat names, they were not used for marketing purposes until OS X Jaguar. Announced at the 2002 Macworld Expo, it featured an updated Mail app that placed spam in a junk folder. iChat became Apple’s default instant messaging app, with built-in compatibility with AOL Instant Messenger. Along with a new Finder offering refined search, OS X 10.2 included universal access for the first time and allowed users to magnify screen contents or launch applications with speech dictation.

The Evolution of Mac OS X [Panther]
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Panther

Apple announced OS X Panther at WWDC 2003. It included Exposé, a useful feature that let users instantly view all open windows at once, view windows of a current program or just view files on the desktop. iChat AV let users communicate with audio and video as well as text, and Safari became the Mac’s default web browser after it dropped support for Internet Explorer for Mac.

OS X 10.3 also introduced FileVault to encrypt hard drive data with 128-bit keys; Font Book, Apple’s simplified application for managing system fonts; Xcode, Apple’s developer tool to build Mac applications; and a revamped Finder with sidebar for easy access to disk drives, networks and folders.

The Evolution of Mac OS X [Tiger]
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Tiger

OS X Tiger was introduced at WWDC 2004. It included a universal search client, Spotlight, which allowed users to search their entire system from the menu bar for files, emails, contacts, images, calendars and applications. Dashboard featured widgets for weather, flight information, stock tickers and more. Safari included RSS features and iChat supported up to four participants in a video conference or 10 participants in an audio conference.

OS X 10.4 also introduced Automator, an application that automated tasks and workflows such as renaming large groups of files or resizing dozens of images; and VoiceOver, an accessibility interface that provided magnification options, keyboard control and spoken English descriptions of what’s happening on screen.

OS X Tiger became the first OS to support the Apple-Intel architecture after Apple's transition to Intel x86 processors, and it became the longest running version of Mac OS X prior to Leopard's release 30 months later.

The Evolution of Mac OS X [Leopard]
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Leopard

Apple introduced OS X Leopard at WWDC 2006, and it became a redefining moment for its software, since it was noted to be the "largest update of OS X." It featured a modernized look with a three-dimensional, reflective Dock, a semitransparent menu bar, larger drop shadows for active windows and new high-resolution icons.

OS X 10.5 included Stacks, a grouping feature that displays files in a "fan" or "grid" style in folders on the Dock; an updated Finder that incorporates the Cover Flow visual navigation interface first seen in iTunes, iPhone and iPod touch; Quick Look, which allows a "preview" of items by hitting the space bar; Spaces, a way to group application windows on more than one virtual desktop; Time Machine, an automatic backup utility that allows users to restore deleted files; and Boot Camp, Apple's software client to run Microsoft Windows natively on a Mac. With the release of the aluminum unibody MacBook and Macbook Air with multi-touch track pad, OS X Leopard also unofficially supported multi-touch gestures.

The Evolution of Mac OS X [Snow Leopard]
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Snow Leopard

OS X Snow Leopard was introduced at WWDC 2009, and for the first time, users could buy it for a very affordable $29. This update featured all of Apple’s applications rewritten in 64-bit code; Grand Central Dispatch, a new way for software developers to write applications that takes advantage of multicore processors; and OpenCL, a C-based open standard allowing developers to tap into the power of the GPU for tasks that go beyond graphics.

OS X 10.6 also built off of the previous OS (hence its name) with further enhancements such as faster disk ejecting, quicker Time Machine backup, faster boot and shut down times and faster OS installation. OS X Snow Leopard was significantly smaller that OS X Leapard and freed up to 7 GB of space; it also became Apple's first operating system to be Intel-only. It became the second-longest running Apple OS after Tiger and the last to need a physical disc after the introduction of the Mac App Store in the Snow Leopard 10.6.6 update.

The Evolution of Mac OS X [Lion]
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Lion

Apple introduced OS X Lion at a special event called "Back to the Mac." It officially supported multi-touch gestures with added gestures and responses such as rubber-band scrolling, page and image zoom and full-screen swiping. Apps could be full-screen for the first time, and the introduction of Mission Control combined Exposé, Dashboard, Spaces and full-screen apps to give users one place to see and navigate everything running on their Mac.

OS X 10.7 brought many developments made in iOS, such as an easily navigable display of installed applications -- Launchpad -- and new thinner, gray scrollbars that disappeared when not used. OS X Lion also included support for the Mac App Store, introduced in OS 10.6.6. Other features included Resume, which allowed apps to reopen if closed, and Auto Save.

The Evolution of Mac OS X [Mountain Lion]
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Mountain Lion

Apple introduced OS X Mountain Lion at WWDC 2012, and from then onward dropped the "Mac" prefix from all references of OS X on its website. iCloud synced mail, calendars, contacts, reminders, documents, notes and more between Macs, iPads, iPhones and iPod touches. Apps from iOS devices were also brought over: Reminders, Notes and Messages, which brought iMessage to the Mac for the first time; Notification Center alerted users to new emails, messages, software updates or calendar alerts; Dictation converted words into text; and a new Sharing button allowed the sharing of photos, videos, files and links with Mail, Messages and AirDrop.

OS X 10.8 integrated Facebook and Twitter so users could set up and manage their accounts right in System Preferences. AirPlay Mirroring enabled easy sharing from a Mac to an Apple TV, and Game Center brought games from iOS to the Mac. Finally, Gatekeeper helped protect users from downloading and installing malicious software to their Macs by only permitting users to install apps from the Mac App Store and other identified developers. Users could download this update for a slimmer price at $19.99.

The Evolution of Mac OS X [Mavericks]
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Mavericks

Apple introduced OS X Mavericks at WWDC 2013. It replaced its big cat naming convention with places in Apple's home state of California; thus Mavericks was named after a popular surfing spot.

OS X 10.9 introduced iBooks from iPad, Maps from iOS that enabled users to send directions from their Mac directly to their iPhone, and Tags, a new way to organize and find files by labeling them via colors or particular naming conventions; iCloud Keychain stores, encrypts and automatically enters passwords; the Finder can support tabbed browsing for further productivity and support for working on multiple displays with menu bars and dock; and Notification Center allows users to interact with alerts, such as replying to an iMessage. Icons were redrawn double their size for the new MacBook Pro with Retina Display, and the dock changed to a two-dimensional translucent rectangle with rounded corners that iterates the dock used in Tiger. For the first time ever, Mac users could update to the latest Mac OS for free.

The Evolution of Mac OS X [Yosemite]
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Yosemite

Apple announced OS X Yosemite at WWDC 2014. To match the design overhaul of iOS 7, OS X Yosemite discarded the skeumorphic interface it had used for over 10 years. The update included a flat graphic design, blurred translucence effects, updated icons, light and dark color schemes, and the first time ever replacement of the default system typeface from Lucida Grande to Helvetica Neue. With Continuity, Macs can now receive and make calls from iPhone on the same Wifi network. Macs can also send and receive SMS text messages, and iCloud syncs all iMessages and text messages between a Mac and an iPhone.

OS X 10.10 includes Handoff, which allows users to write an email or browse Safari while moving seamlessly from a Mac to an iPhone or iPad and vice versa. The new Photos app replaces iPhoto and integrates photos from iCloud or an iOS device into one place. Mail allows marking up attachments right in the app, and Mail Drop allows users to send large files (up to 5GB) without having to worry about an email client's limitations. Finally, iCloud Drive lets users store all types of files in one place and access them from any device.

The Evolution of Mac OS X [El Capitan]
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El Capitan

OS X El Capitan was announced at WWDC 2015. It enhances the design and usability of OS X Yosemite with performance and security improvements. Features include Split View, which places two full screen apps side by side; a streamlined Mission Control, which makes it easier to see all open windows in one place; a smarter Spotlight that now delivers results for weather, sports, stock, web, video and transit directions and can deliver information using natural language; a refreshed Maps app that includes public transit information for some U.S. cities; Metal, a new graphics core technology that gives games and apps almost direct access to the Mac's graphics processor for better performance; in-app Multi-Touch gesture support; and system-wide performance improvements to improve responsiveness and efficiency when using apps.

A new font called San Francisco that is currently being used on iPhones running iOS 9 and Apple watches running watchOS will also replace Helvetica Neue that debuted on Yosemite. Mac OS X 10.11 became available Wednesday, September 30th for free.