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How do I upgrade to mountain lion and keep my old OS intact so I can use either?

233 Views 5 Replies Latest reply: Mar 15, 2013 1:49 PM by Lanny RSS
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Mar 15, 2013 12:57 PM

I'd like to upgrade to OS 10.8, but keep 10.6.8 to use with certain applications. If I wish to store the new OS on an external drive what do I need to do when I download it? Also, when the computer boots up, will it automatically ask me which OS I want to use?

MacBook Pro (17-inch Core 2 Duo), Mac OS X (10.6.8), 2.33GHz Intel Core 2 duo; 2GB SDRAM

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