If I could find the chips at a good price and a friendly MacBook Pro engineer, is there any reason why I could not convert a MacBook Pro into a proper Quad-core one with a Core i7-720 or i7-740 (or even 820, 840 etc.) 1. Can I replace the CPU? 2. Any reason why OS X would not work? 3. Any reason why the four cores would not be recognized? 4. Would it get too hot? What would I need to do to make sure the CPU runs at the right speed and TurboBoosts sensibly? I am going to have to lose my wonderful Kobalt i7-720 laptop in a few weeks and have been looking longingly at the Sony F13 series with the i7-740, and other laptops with i7-7/8/940 and Phenom X4s, wondering why Apple have stopped with the i7-620. So I am thinking about making my own.