1. OS X Mountain Lion (version 10.8) is the ninth major release of macOS, Apple Inc.' S desktop and server operating system for Macintosh computers. OS X Mountain Lion was released on July 25, 2012 for purchase and download through Apple's Mac App Store, as part of a switch to releasing OS X versions online and every year, rather than every two years or so.
2. It runs on the platform including x86-64. Mac OS El Capitan is preceded by OS X 10.10 Yosemite and it is succeeded by macOS 10.12 Sierra. System requirements. All Macintosh PCs that can run Mountain Lion, Mavericks, or Yosemite can run El Capitan in spite of the fact that not the majority of its highlights will take a shot at more seasoned PCs.
3. Mac OS X El Capitan. Yosemite just got bigger. Free Programme for Mac Users. Free Mac Data Recovery. Update for Lion to 10.7.3.

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.

Use About This Mac to see which Mac operating system version is installed on your Mac, and find out whether it's the latest version.

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 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.

Upgrade Macos Mountain Lion To El Capitan