- Mac OS X 10.7.5 (Lion) (link explains the pitfalls of losing PowerPC applications) supports iTunes 12.2.2.25 (available from Software update as of ), iOS 8 and iOS 9.0. Mac OS X 10.8 (Mountain Lion) is required for iTunes 12.3 and iOS 9.2 and iOS 9.2.1(except iCloud Drive, and the new notes).
- The Mac OS X Mountain Lion was a closed source software with multiple open source components. The requirements for running the software include 2GB RAM and 8GB available storage. The software ran on all of Apple’s computers until it was replaced by the OS X 10.9 Mavericks.
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. El Capitan is Apple’s marketing name for OS X version 10.11, the latest update to your Mac’s system software. If your Mac is running Yosemite (10.10), Mavericks (10.9), or Mountain Lion (10.8.
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.
Consumer releases of Mac OS X included more backward compatibility. Mac OS applications could be rewritten to run natively via the Carbon API; many could also be run directly through the Classic Environment with a reduction in performance. The consumer version of Mac OS X was launched in 2001 with Mac OS X 10.0. 
The user’s Mac must have a minimum of 2 GB of RAM and 12.5 GB of available storage space in case they are upgrading to macOS Mojave from any one of its predecessors from OS X El Capitan and onwards. The new Mac OS X is compatible with any Mac PC that was previously running Mac OS X versions 10.8 - Mountain Lion, 10.9 - Mavericks, 10.10 - Yosemite. The reason why Mac computers only with Mavericks upgrade or latest will work with download El Capitan is thanks to Apple not removing any Mac hardware from its Mac OS X support list since.
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 Big Sur. As updates that change the macOS version number become available, this article is updated to show the latest version of that macOS.
Mac Os X 10.12 Update Download Free
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 10.12.0
| macOS | Latest version |
|---|---|
| macOS Big Sur | 11.2.3 |
| 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 |