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 other 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.

Make sure you’re ready to upgrade. Before you upgrade, we recommend that you back up your Mac. Then, if your Mac is running OS X Mavericks 10.9 or later, you can upgrade directly to macOS Catalina. Free download Milestone Reminder Milestone Reminder for Mac OS X. Milestone Reminder is a utility to manage and organize family's, friend's and associate's birthdays, anniversaries, and other dates. IT 365 Milestone One Guidelines and Rubric File System Overview: For the final project, you will choose a case study of an operating system (OS) between a real-time system, the Linux operating system, Windows, or Mac OS X. You will complete four milestones in which you will research and analyze the chosen system, including how to develop programs on the system. Operating System for Mac and MacBook Started as macOS in 1984. For example, the first patch after the milestone release of macOS 10.15 was macOS 10.15.1.

With your birth as our starting point, then, let's look at the biggest desktop OS milestones of the past 40 years. And form the core of at least one major commercial operating system, Mac OS X.

Milestone For Mac Os High Sierra

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 Mojave, followed by its version number. If you need 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. 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.

Milestone For Mac Os 10.13

macOS	Latest version
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