We will share other DMG files in subsequent articles. You can also use this method to install Mountain Lion over Leopard, Mountain Lion, or Lion. Download Mac OS X 10.8 Mountain Lion is available for older systems that are not compatible with the latest version of macOS and requires the following: OS X Snow Leopard 10.6.8, Lion 10.7, or Mountain Lion 10.8 already installed 2 GB of memory 8 GB of available space Some features require an Apple ID terms apply. This is a guide to downloading and installing a copy of macOS X Mountain Lion DMG on your Mac.ĭownloading and installing the DMG file is the only way to get Mountain Lion on your Mac without using an external drive or DVD. – Gatekeeper: Blocks installation of applications downloaded from outside the Mac App Store and identified as malware. – Share Sheets: Share content with other applications without switching between them. – Notification Center: A notification center where users can see notifications from various apps in one place.

Mountain Lion includes several new features such as: It was released on July 25, 2012, and has a redesigned user interface called “Mission Control” and “Launchpad.” The operating system was announced on February 16, 2012, at Apple’s Worldwide Developers Conference (WWDC) and released to the public on July 25, 2012.Īpple’s Mountain Lion is the 10th version of the Mac OS X operating system for Apple computers.

Mountain Lion is the eighth major release of Mac OS X, which runs on Macs with Intel processors.

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