![]() ![]() (This was a common issue with Lion, although in our experience the day of Mountain Lion’s release, several Macworld editors were able to download Mountain Lion without hassle onto Macs running Mountain Lion.) If this happens to you, launch the Mac App Store app and Option+click the Purchases tab in the toolbar that should show the Download button next to Mountain Lion in the Purchases list. ![]() You won’t even be prompted to authorize the installer on each Mac, as you are with other Mac App Store-distributed software-the Mountain Lion installer does not use digital-rights management (DRM).ĭownloading the installer onto a Mac already running Mountain Lion: If you already have Mountain Lion-either the official release or the golden master (the final developer release, a.k.a., the GM)-installed on a Mac, you may have problems downloading the installer onto that Mac, as the Mac App Store app may think you already have it and, thus, not offer to let you download it. This is obviously a much faster approach than re-downloading the 4.4GB installer onto each of your Macs. If downtime isn’t an option for you, you might consider holding off for OS X 10.8.1.Ĭopying the Mountain Lion installer onto other Macs: Alternatively, once you’ve downloaded the Mountain Lion installer onto one computer, you can copy it-over your local network or by using a flash drive, DVD, or external hard drive-to your other Macs. It could be bug-free, but if the history of OS X is any indication, we’ll see the first update, containing a number of bug fixes, within a few weeks. As I did last year with Lion, I’ve compiled this guide to getting and installing Apple’s latest OS.įair warning: If you install Mountain Lion right when it’s released, keep in mind that you’re installing version 1.0 of a major new OS. ![]() This makes it easier and more convenient to upgrade your OS than having to buy and use a DVD or thumb drive, but it also raises a number of questions, and it presents upgrade obstacles for some users. More specifically, it’s available only as a download from Apple’s Mac App Store. OS X 10.8-better known as Mountain Lion-inherits Lion’s distribution method. But Lion changed all that by making OS X available for direct download. Before Lion (OS X 10.7) debuted last year, installing the latest major version of Mac OS X meant buying a disc and slipping it into your Mac’s optical drive. ![]()
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