Our article on making a bootable Lion-install drive. Using Disk Utility,” below, but from Step 6 on, follow the instructions under “To create a bootable DVD” in That said, if, for whatever reason, you absolutely need to create a bootable install DVD, follow steps 1 through 5 under “ In addition, you can easily update a USB stick or external hard drive each time an update to Mac OS X is released, as explained below with a DVD, you have to toss the disc in the trash and start over, which is both a hassle and bad for the environment. More and more Macs ship without a built-in optical drive booting and installing from a DVD is very slow and 8GB flash drives can be found for $10 or less-there’s little reason to opt for a DVD anymore. Though it’s possible to make one, I don’t recommend it these days. So stay tuned.You may have noticed that I didn’t mention making a bootable install DVD. 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. 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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