OK, so you can, but should you? Prior to Snow Leopard, I generally recommended a clean install.
#Lion vs mountain lion mac install
(This is one situation in which the more apps you’ve purchased through the Mac App Store, the better-you just launch the Mac App Store app and click a few buttons to automatically reinstall everything you’ve purchased.) Should you perform a clean install of Mountain Lion? If you truly want a clean start, you’ll instead need to manually copy your personal data from your backup to your new Mountain Lion installation, and then reinstall all of your software. Once you’ve done this, if you want to use Setup/Migration Assistant to restore data from your backup, proceed with Step 8.
Specifically, scroll down to the section called “The brute-force method” and perform Steps 1 through 7, substituting “Snow Leopard” or “Lion” for “Leopard”-the result is a clean install.
#Lion vs mountain lion mac how to
In fact, you can use the instructions in my article on how to install Mountain Lion over Leopard. So if you first back up your existing Snow Leopard or Lion installation and all your files-I recommend creating a bootable clone using SuperDuper or Carbon Copy Cloner-you can then boot from a bootable installer drive, erase your Mac’s normal startup drive, and install Mountain Lion on it. As explained in my main article on installing Mountain Lion, the installer will let you install the new OS onto a blank drive.
Can you perform a clean install of Mountain Lion?įirst, the technical question: Given that the OS X 10.8 installer doesn’t include an official clean-install option, is it possible to perform such an installation? The simple answer is: Yes. As with Lion last year, many Mac users are asking two related questions: (1) Can you perform a clean install of Mountain Lion? and (2) Should you? Here’s my take on each of these questions. But a new download-and-install procedure debuted with Lion (OS X 10.7) and continues with Mountain Lion (OS X 10.8)-instead of a bootable installation DVD, you download the latest OS X installer to your Mac and install it from the same drive.
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