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.

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.

Which macOS version is the latest?

The last version of Internet Explorer that worked on Mac was for OS X 10.6.8 Snow Leopard which is now obsolete so don’t be fooled by any site that claims you can download it still. How To Use Internet Explorer on a Mac. In a nutshell, there are two ways to get Internet Explorer on a Mac nowadays: Install Windows on your Mac. MacOS Big Sur features the first major redesign to macOS since Mac OS X, with Apple introducing a new look that's modern but familiar, with a focus on translucency, consistency, and content. All-new Interface. MacOS Big Sur brings a new design that’s been finely tuned for the powerful features that make a Mac a Mac. Core features, such as the menu bar and Dock, take advantage of the large Mac display, with translucent backings and spacious pull-down menus. That's all very well, but Apple's most recent version of macOS - Big Sur - won't run on any Mac older than 2013, and in some cases 2014. Which may well mean that your Mac can't officially be.

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.

Mac Os X Big Sur