All Macs run macOS, previously known as Mac OS X, and have done so since the introduction of the first version of Mac OS X in 2001. Before that, Macs ran Mac OS 9 which came out in October 1999 ...

We’ve put together a macOS compatibility checker that will show you what Macs the different versions of macOS and Mac OS X support, so you can tell what version you should be running on your Mac.

OS X Mavericks (10.9) Mavericks was a major business pivot for Apple, as it was the first version of the OS the company released for free, offered to users as an upgrade via the App Store in ...

- Mac OS X Server 10.6.3 v1.1 Update (Combo) weighs in at 897.32 MB and is similarly compatible with all earlier versions of Mac OS X Server Snow Leopard.

Mac OS 8.6: The classic Mac OS nears the end of its life Released in 1999 and one of the last versions of the classic Mac operating system before it was replaced by OS X, you can find this old ...

The current Mac operating system—which launched in 2001, 23 years ago, as Mac OS X—has been around longer than the "Classic" OS, which Apple offered for a total of 16 years.

Microsoft's latest operating system gained 2.01 percentage points in August to end with 7.41% of the market, allowing it to gain a narrow lead on Mac OS X, which posted a market share of 7.28%.

Mac OS X 10.4.7 (#4): More on re-released Intel version; Continuing problems logging into sites with Safari 2.0.4; more ...

Mac OS X 10.7 Lion introduces a big shift toward centralizing all your content, whether it's on your desktop, your iOS device, or in the newly launched iCloud.

In previous versions of OS X, Mission Control stacked together all open windows of particular apps. That made it difficult if you wanted to access a particular window or move that window to a new ...