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I have a late 2009 27" iMac. The iMac runs the default OS X version, 10.6.

This week I bought a new MacBook with OS X 10.8. Can I install the new OS X on my iMac without buying 10.8? Does the license allow this, and if it does, how do I do it? If you know how I can register OS X with my Apple ID, I can install OS X 10.8 via wifi.

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up vote 4 down vote accepted

The licence the install of OS X included with a new Mac is exclusive to that Mac, you can't re-use it on another. Buying Mountain Lion from the App Store entitles you to install it on all of your personal Macs.

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Thanks. I didn't find that part. – Marco Daniel Oct 28 '12 at 15:34

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