Go to xlr8yourmac.com. Find their CPU upgrades user reports database. Search by your machine, and Upgrade Manufacturer=Apple.
Also check their FAQ and Machine Specific pages.
I…
A - So I can try it out on our current iMac. After that, I'm going to wait to buy a new Mac, so it will come with an OS X CD.
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Eliott Wolfe
Winnetka, Calif