O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers. Once Lion is downloaded, go to the Applications folder and find the copy of Lion. Get OS X Mountain Lion Portable Genius now with the O’Reilly learning platform. When you receive the email and code, you download OS X Lion to your Mac from the App Store. 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. 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.
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