Mac service and repair. Learn about AppleCare+ and the Apple limited warranty coverage, start a service request for your Mac, and find out how to prepare your Mac for service. Learn more about repairs.

Is your Mac up to date with the latest version of the Mac operating system (macOS or OS X)? Is it using the version required by some product or feature? Which versions are earlier (older) or later (newer, more recent) than the version currently installed? To find out, learn which version is installed now.

Chromecast for second monitor mac. 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'll see the macOS name, such as macOS Mojave, followed by its version number. If some product or feature requires you to know the build number as well, click the version number to see it.

This example shows macOS Catalina version 10.15 build 19A583.

Which macOS version is the latest?

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 Catalina. And 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 installed by macOS, such as Safari, Books, Messages, Mail, Music, Calendar, and Photos.

Learn more

• Always use the macOS that came with your Mac, or a compatible newer version.
• Learn how to reinstall macOS from macOS Recovery.

Back up your Mac

And your memories. A few simple steps can save you from losing your favorite photos and files.

Mac service and repair

Learn about AppleCare+ and the Apple limited warranty coverage, start a service request for your Mac, and find out how to prepare your Mac for service.

How to sync music from your Mac to your iPhone in macOS Catalina

If you've got music on your Mac that you want to sync to your iOS device you can use the Finder starting in macOS Catalina.

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