Our original instructions for creating a bootable Lion-installer drive. Note: If you purchased Lion for another Mac, so you have a version of the Lion installer from the Mac App Store, you can use OS X Lion USB Thumb Drive doesn’t work with Macs that shipped with Lion-it’s designed for installing the OS on pre-Lion Macs.) The solutionįortunately, it’s possible to create a bootable Lion installer even if your only Mac is a newer model, although doing so requires a bit more work. Utility for creating an emergency Lion Recovery drive but, like the standard Lion Recovery feature, this drive requires you to download the full 4GB of Lion each time you want to install-it’s better to have the full installer on a bootable drive. In other words, you don’t have a downloadable version of the installer unless you happened to purchase Lion for another, older Mac. But if you have a Mac that debuted after Lion (any Mac from July 2011 or later), your Mac shipped with Lion pre-installed. (Lion Internet Recovery is available on mid-2011-or-later Macs, as well as some older Macs that have receivedĮxplained how to create a bootable Lion-installer drive from the Mac App Store version of Lion. And if you’ve got a Mac that doesn’t support Lion Internet Recovery-a version of Lion Recovery based on special firmware-recovery mode may not even be available if your Mac’s drive itself is having problems, whereas a bootable install drive will always be there for you. For starters, Lion Recovery doesn’t include the full Lion installer-it requires you to download nearly 4GB of data before you can reinstall Lion-whereas a bootable installer drive contains the entire Lion installer, making installation much, much faster. For example, if you want to install Lion on multiple Macs, a bootable installer drive can be more convenient than downloading or copying the entire Lion installer to each computer.īut even for troubleshooting, a bootable installer drive has advantages over Lion Recovery. But as IĮxplained when Lion debuted, there are still good reasons to have a bootable installer disc or drive. So stay tuned.It’s a convenient feature that, in theory, means you no longer have to carry a Mac OS X Install disc or a bootable external hard drive. 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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