Mac OS X and versions below are not supported in ID-porten. To update your mac OS X, go to the website pethydro.org and click "Upgrade now". Download OS X Mountain Lion Update v (Combo) Mountain Lion: Apple FIPS OS X Cryptographic Modules v OS X Mountain Lion (version ) is the ninth major release of OS X (now named macOS), Apple Inc.'s desktop and server operating system for Macintosh . The security clock is ticking down for Apple's OS X Mountain Lion, which will probably be retired from support this fall before the Cupertino. If you need to purchase Mac OS X Mountain Lion, you may order it from this page. The current version of the Mac operating system is macOS Mojave. Mac OS X (Mountain Lion) is no longer available for purchase from the Click Install, and enter your Apple ID information if prompted. Download Mac OS X Mountain Lion DMG File Installer for version Free download and experience Apple's OS X 9th edition with brand. OS X Mountain Lion is available now as a download from the Mac App Store. Just click the Mac App Store icon in your dock, purchase. This section explains the ways you can increase the text size in the Mac OS Snow Leopard but the actions are the same for Mac OS Mavericks.