Apple’s macOS Systems In Order: From 1984 To Present Day…


Apple's macOS Systems In Order From 1984 To Present Day...Pin

Here’s the full list of the macOS operating systems in order – including Mac OS, Mac OS X, and macOS!



Key Takeaways: macOS Versions Timeline

Pre-Mac OS X Evolution

  • System 1 – 5 (1980 – 1987): The foundational years of Mac systems, starting from System 1 in 1980 to System 5 in 1987.
  • System 6 – 7 (1988 – 1992): Significant upgrades with System 6 in 1988 and the transition to Mac OS with System 7 in 1991.
  • Mac OS 7 – 9 (1992 – 1999): Continued evolution under the Mac OS branding, culminating in Mac OS 9 in 1999.

The Mac OS X Era

  • 10.0 Cheetah – 10.3 Panther (2001 – 2003): Introduction of Mac OS X with 10.0 Cheetah in 2001 and rapid subsequent releases.
  • 10.4 Tiger – 10.7 Lion (2005 – 2011): Tiger in 2005, followed by Leopard, Snow Leopard, and Lion, showcasing major advancements.
  • 10.8 Mountain Lion – 10.11 El Capitan (2012 – 2015): A series of updates from Mountain Lion in 2012 to El Capitan in 2015.

Transition to macOS

  • macOS 10.12 Sierra – 10.15 Catalina (2016 – 2019): Transition from OS X to macOS, starting with Sierra in 2016 through to Catalina in 2019.
  • macOS 11 Big Sur – 13 Ventura (2020 – 2022): Modern macOS era begins with Big Sur in 2020, followed by Monterey and Ventura.

The Mac operating system has a long and varied history. It’s been known by many names and can be grouped into three main eras, which you can read about here.

But even the era groupings can be very confusing as Apple has not always been consistent with its naming system, nor its version numbering system.

For example, the Mac operating system has been known as System 1, Macintosh System Software, System Software, System, Mac OS, Mac OS X, OS X, and, most recently, macOS.

Talk about a confusing list of names!

The Mac OS Era

Apple's macOS Systems In Order: From 1984 To Present Day...Pin

The Mac OS era, spanning from 1984 to 2009, was a period of groundbreaking innovation and evolution for Apple. It all kicked off with the introduction of System 1 in 1984, a pioneering step that laid the foundation for graphical user interfaces in personal computing.

This early version was basic but revolutionary, offering a user-friendly approach compared to the command-line interfaces of the time.

As the years rolled by, Apple continued to refine its operating system.

System updates, from System 2 up to System 7, introduced more features, better graphics, and enhanced functionality.

In 1992, Apple transitioned to Mac OS 7, marking the beginning of the Mac OS naming convention. This era brought in significant advancements like virtual memory, improved user interface, and the introduction of QuickTime.

The late 90s saw further progress with Mac OS 8 and 9.

These versions introduced a more colorful and 3D appearance, multi-threading for improved performance, and an early form of internet integration.

Mac OS 9, released in 1999, is often remembered for its introduction of the Sherlock search utility and improved networking capabilities.

In 2001, the launch of Mac OS X 10.0, codenamed “Cheetah,” marked a new chapter.

It was a substantial overhaul from its predecessors, built on a UNIX foundation which brought enhanced stability and performance.

Despite initial criticisms for being slow, subsequent versions like “Puma,” “Jaguar,” “Panther,” “Tiger,” “Leopard,” and “Snow Leopard” saw gradual improvements in speed, stability, and added features like Spotlight search and Time Machine for backups.

As you can tell from the list, most weren’t actually called “Mac OS”. And the version numbers rarely matched up with the release numbers). The year the system first debuted follows the version.

  • Mac OS 1 (known as System 1) – 1984
  • Mac OS 2 (known as Macintosh System Software 0.3) – 1985
  • Mac OS 3 (known as Macintosh System Software 0.7) – 1986
  • Mac OS 4 (known as System Software 2.0) – 1987
  • Mac OS 5 (known as System Software 5) – 1987
  • Mac OS 6 (known as System Software 6) – 1988
  • Mac OS 7 (known as System 7) – 1991
  • Mac OS 8 – 1997
  • Mac OS 9 – 1999

macOS Systems In Order: The Mac OS X Era

How Steve Jobs Nearly Ruined The iPhonePin

The story of macOS is a tale of tech evolution, starting in 1997 when Apple, always on the lookout for the next big thing, snagged NeXT Computer.

Picture this: NeXT, the brainchild of Steve Jobs during his Apple hiatus, was crafting a cutting-edge operating system named NextStep. It was all the rage with its UNIX roots, boasting modernity, stability, and power – exactly what Apple craved.

Fast forward to 1998, and Apple’s grand plan was to roll out macOS.

But, as with all epic tales, there were hitches. Integrating the complex NextStep code with Apple’s ecosystem was no walk in the park, leading to a series of delays.

Finally, in 2001, the tech world buzzed with the launch of Mac OS X 10.0, fondly nicknamed “Cheetah.” This wasn’t just an update; it was a leap. Cheetah brought the power and stability of a modern OS, although it did face some flak for being a bit sluggish and glitchy.

Apple wasn’t one to sit back.

Year after year, they churned out new and improved macOS versions, each adding a sprinkle of features and a dash of performance enhancements.

A pivotal moment came in 2009 with the release of Mac OS X 10.6, “Snow Leopard.”

This wasn’t just another update; it was a massive step forwards. Snow Leopard was sleek, efficient, and ran circles around its predecessors in terms of speed and stability.

It marked a significant milestone in the macOS journey, setting the stage for the continuous evolution of Apple’s operating system.

The Mac OS X era is also when version numbering got really confusing.

Previously each new Mac operating system every year got a new number, such as Mac OS 8 in 1997 or Mac OS 9 in 1999).

But with Mac OS X, Apple decided to keep the main version number always “10”. This made sense in a way because “Mac OS X” literally means Mac OS 10 (the X is the Roman numeral for 10).

So that means all Mac OS X (and later, OS X) operating systems were ALL operating system 10 and Apple labeled each new version as just a point upgrade. Given this numbering scheme, it’s no wonder Apple increasingly started to refer to Mac OS X versions by their codenames in marketing materials.

  • Mac OS X 10.0 Cheetah – 2001
  • Mac OS X 10.2 Jaguar – 2002
  • Mac OS X 10.3 Panther – 2003
  • Mac OS X 10.4 Tiger – 2005
  • Mac OS X 10.5 Leopard – 2007
  • Mac OS X 10.6 Snow Leopard – 2009
  • Mac OS X 10.7 Lion – 2011
  • OS X 10.8 Mountain Lion – 2012
  • OS X 10.9 Mavericks – 2013
  • OS X 10.10 Yosemite – 2014
  • OS X 10.11 El Capitan – 2015

macOS Systems In Order: The macOS Era

macOS Version HistoryPin

Finally, we get to the current macOS era. During this era, Apple ditched the “10.x” version scheme and is now back to giving macOS a new version number every year.

macOS Big Sur is another major milestone in the history of the Mac operating system. It’s the first Mac OS custom-built to rub on Apple’s M-series Macs.

Those are the Mac, like the new M2 MacBook Air, which feature M-series Apple Silicon.

Which Was The Best Mac Operating System?

Many people think the latest Mac operating system is the best simply because it’s the latest and thus has the most modern features. And that’s a completely valid way to measure the “best”.

However, if you ask longtime Mac users what the best Mac operating system is, many will likely say it was Mac OS X 10.6 Snow Leopard.

Why? Because Mac OS X 10.6 Snow Leopard is known for being an incredibly stable, bug-free OS. Even a dozen years after its release, there are still people running Mac OS X 10.6 Snow Leopard on older machines – and they still love it.

As a matter of fact, when any new macOS is released now, if it has major bugs, you can bet you’ll hear people clamoring for the bug-free and stable days of Mac OS X 10.6 Snow Leopard.

By the way, you can download old versions of macOS (just not Snow Leopard).

Latest Smartphone Releases


  • Xiaomi 15S Pro

    The Xiaomi 15S Pro didn’t come with a flashy launch, but it brings some seriously heavy hardware to the table. A custom 10-core chip, Leica-engineered cameras, and one of the brightest displays on the market

  • Samsung Galaxy S25 Edge

    At just 5.8mm thick, it’s one of the thinnest Android phones ever made—but don’t let the slim profile fool you. This phone is all flagship under the hood.

  • Nothing Phone (3a) Pro

    It’s got the same slick design and OLED display, but adds a periscope zoom camera and a 50MP front-facing shooter.

  • Nothing Phone (3a)

    The Nothing Phone (3a) nails the formula: give people what they actually want, keep the price low, and make it look cooler than anything else in its class.

  • Motorola EDGE 60 Pro

    With a bold design, flagship-like display, and surprisingly refined camera system, it’s one of the most interesting mid-range phones of 2025.

  • Google Pixel 9

    I’ve been using the Pixel 9 for a few weeks now, and honestly? It nails all the basics—and a bit more. Killer stuff all round!

  • Google Pixel 9 Pro

    I’ve used the Pixel 9 Pro as my daily device, and it’s hands-down the best balance of power, practicality, and photography you’ll find on Android right now.

  • OnePlus 13

    I’ve been using the OnePlus 13 as my daily driver for a few months now—and I’ve got to say, it’s easily one of the best Android phones I’ve tested this year.

  • Xiaomi 15 Ultra

    After using the Xiaomi 15 Ultra for over a week, I can confidently say: this phone is an absolute beast. It’s made for camera nerds, power users, and creators.

  • iPhone 16 Pro Max

    If you’ve been holding out for a truly complete iPhone, the 16 Pro Max delivers—hard. After using it daily, I won't be going back…

  • Google Pixel 9 Pro XL

    Big screen, big battery, and even bigger brains—this is the Pixel to get if you want Google’s best hardware and longest support.

  • Google Pixel 9a

    The Pixel 9a brings Google’s flagship-level smarts to a budget-friendly package, and it’s easily one of the best-value Android phones of 2025.

Best SIM-Only Plans & Deals


  • Boost Mobile Unlimited Premium Plan

    Boost’s top-tier option brings the heat: 50GB of premium data, hotspot, North America roaming, global talk & text, and $430 off select devices. All-in at $60/month with no contract.

    +

    Data: Unlimited (50GB premium speed)

  • Boost Mobile Unlimited+ Plan

    Level up with 40GB of premium data, hotspot access, global calling, and up to $300 in device savings. All for just $50/month. No contracts and flexible phone options included.

    +

    Data: Unlimited; Speed Caps After 40GB

  • Boost Mobile Unlimited Plan

    Start strong with 30GB of premium data, unlimited everything, and a killer intro offer: just $15/month for the first 3 months, then $25/month forever. No contracts. No fluff. Big value.

    +

    Data: Unlimited (Speed Caps Over 30GB)

  • iD Mobile 1 Month SIM-Only: 108GB

    Another high-data, low-cost option with no contract. 108GB for just £9, full 5G access, and the same goodies you get with 12-month deals.

    +

    Data: 108GB

  • iD Mobile 1 Month SIM-Only: 20GB

    The lowest price option. 20GB for £6 with all the same perks as pricier plans. Great if you don’t use much data and want to save every penny.

    +

    Data: 20GB

  • iD Mobile 1 Month SIM-Only: 110GB

    This plan gives you big data and zero commitment. 110GB for just £10 with all perks intact. If you need more data but want the freedom to cancel, this is the one.

    +

    Data: 110GB

  • iD Mobile 1 Month SIM-Only: 60GB

    More data, same price. For just £8/month, you get 60GB on a no-strings 1-month rolling plan. Ideal for users who stream often but don’t want long commitments.

    +

    Data: 60GB

  • iD Mobile 1 Month SIM-Only: 40GB

    Perfect if you want full flexibility. You get 40GB and all of iD Mobile's perks with no lock-in, annual increases, or setup fees. Great for short-term users.

    +

    Data: 40GB

  • iD Mobile 12 Month SIM-Only: 60GB

    One of the best pound-per-GB plans around. You get 60GB for £8 with £25 cashback, which means you’re effectively paying closer to £6/month. Includes roaming and data rollover.

    +

    Data: 60GB

  • iD Mobile 12 Month SIM-Only: 108GB

    This deal gets you a healthy 108GB of 5G data for less than a tenner, with no upfront costs and £24 cashback. All the perks are included too: data rollover, roaming, and loyalty rewards.

    +

    Data: 108GB

  • iD Mobile 12 Month SIM-Only: Unlimited Data

    This iD Mobile plan doesn’t just compete on price, it’s up there with the best of them. Unlimited everything, a year-long lock-in with no price rises, and £42 cashback straight to your pocket. It’s like getting nearly 3 months free.

    +

    Data: Unlimited, No Speed Caps

  • Mint Mobile 20GB Plan

    If you're looking to save some cash on your bills, this plan is an awesome option. You'll get 20GB of data per month and 20GB hotspot data allowance. For moderate to heavy users, that should be more than enough. I seldom use more than 10GB of data a month, and I'm always using my phone

    +

    Data: 20GB