O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers. Get OS X Mountain Lion Portable Genius now with the O’Reilly learning platform. Follow the on-screen instructions to complete your upgrade. After Mountain Lion downloads it begins the installation process. If you don’t have one, click the Create an Apple ID button when prompted.ĥ. Select and buy Mountain Lion from the App Store. Open the App Store and type Mountain Lion into the search field in the upper-right corner.Ĥ. You must at least have Mac OS X 10.6.8 to install Mountain Lion (10.8).ģ. Check the version of OS X you currently have installed by choosing Apple menu→ About This Mac in the upper-left corner of your screen. If you don’t, Murphy’s Law dictates that something will erase Grandma’s recipes that have been passed down for generations.Ģ. Apple has published download links for Mac OS X 10.7 Lion and Mac OS X 10.8 Mountain Lion in its support area. Back up your files before performing the upgrade to Mountain Lion! Years of experience have taught me not to make a major leap (such as an operating system upgrade) without backing up first. Instead you can download the operating systems directly from the companys website.
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