A. Appendix: Installing OS X Mountain Lion
Introduction
If you’re upgrading to OS X Mountain Lion from a previous version of OS X, this appendix describes how to prepare and install OS X Mountain Lion. The temptation is to download the Installation app from the Mac App Store and start the installation, but you can avoid problems by making sure your computer is ready for OS X Mountain Lion. Before you install Mountain Lion, you need to check your computer hardware and software and make several setup decisions that relate to your computer. When you’re ready ...
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