Is your Mac up to date with the latest version of the Mac operating system? Is it using the version required by some product that you want to use with your Mac? Which versions are earlier (older) or later (newer, more recent)? To find out, learn which version is installed now.
If your macOS isn't up to date, you may be able to update to a later version.
Mac OS, operating system (OS) developed by the American computer company Apple Inc. The OS was introduced in 1984 to run the company’s Macintosh line of personal computers (PCs). The Macintosh heralded the era of graphical user interface (GUI) systems, and it inspired Microsoft Corporation to develop its own GUI, the Windows OS.
From the Apple menu in the corner of your screen, choose About This Mac. Cloudtv. You should see the macOS name, such as macOS Big Sur, followed by its version number. If you need to know the build number as well, click the version number to see it.
These are all Mac operating systems, starting with the most recent. When a major new macOS is released, it gets a new name, such as macOS Big Sur. As updates that change the macOS version number become available, this article is updated to show the latest version of that macOS.
If your Mac is using an earlier version of any Mac operating system, you should install the latest Apple software updates, which can include important security updates and updates for the apps that are installed by macOS, such as Safari, Books, Messages, Mail, Music, Calendar, and Photos.
macOS | Latest version |
---|---|
macOS Big Sur | 11.2.3 |
macOS Catalina | 10.15.7 |
macOS Mojave | 10.14.6 |
macOS High Sierra | 10.13.6 |
macOS Sierra | 10.12.6 |
OS X El Capitan | 10.11.6 |
OS X Yosemite | 10.10.5 |
OS X Mavericks | 10.9.5 |
OS X Mountain Lion | 10.8.5 |
OS X Lion | 10.7.5 |
Mac OS X Snow Leopard | 10.6.8 |
Mac OS X Leopard | 10.5.8 |
Mac OS X Tiger | 10.4.11 |
Mac OS X Panther | 10.3.9 |
Mac OS X Jaguar | 10.2.8 |
Mac OS X Puma | 10.1.5 |
Mac OS X Cheetah | 10.0.4 |
It’s hard to believe that Mac OS X macOS is two decades old, but it’s true. On March 24, 2001, Apple released the first non-beta version of Mac OS X 10.0:
The release followed years of development that took NeXT’s technology and molded it into an operating system for the Mac. That process took longer than Apple had predicted, and included a false start known as Rhapsody. That’s really a story for a different time, but in short, that operating system strategy left classic Mac OS developers without a way forward for their applications that didn’t require rewriting them, and the community soundly rejected the entire thing.
After a regroup, OS X began to take shape, with a new technology named Carbon that would allow apps written for the Mac to run natively on the new operating system with some tweaks. I truly believe Carbon is the real hero of the OS X transition, as without it, I don’t think it would have been successful.1
However, Aqua grabbed all the attention. First introduced in Developer Preview 3, this new user interface was shockingly different from Platinum in Mac OS. Full of pinstripes and bright blue elements, Aqua was designed to be as friendly and fun as the colorful iMac G3s with which many users would first experience it.
All of that eye candy came at a cost, though. Performance in the early versions of Mac OS X was notoriously bad as the hardware caught up. By the time most users were ready to switch from Mac OS 8 or 9, OS X was in pretty decent shape.
If you want to learn more about Mac OS X, I’ve rounded up some links for you: