The distribution is available in over 50 languages and comes with many open-source and proprietary applications. Additional applications can be installed from the built-in app store, and Zorin OS even allows its users to install many Windows apps using the Wine compatibility layer. Only the most basic version of Zorin OS. Classic Mac OS (System Software) refers to the series of operating systems developed for the Macintosh family of personal computers by Apple Inc. From 1984 to 2001, starting with System 1 and ending with Mac OS 9. The Macintosh operating system is credited with having popularized the graphical user interface concept. Officially, the operating system that was available on that Mac at the time that you bought it is the oldest version of macOS that can run on that Mac. It's likely that an older OS won't include.

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Is your Mac up to date with the latest version of the Mac operating system? Is it using the version that is required by a product you want to use with your Mac? Which versions are earlier (older) or later (newer, more recent)? To find out, check which version is installed now.

If your macOS isn't up to date, you may be able to update to a later version.

Which macOS version is installed?

From the Apple menu  in the corner of your screen, choose About This Mac. 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.

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Which macOS version is the latest one?

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 will be 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.