I recently purchased a used MacBook which had (as far as I remember) OS X 10.4 installed. The original owner had no disks when selling. I have the disks from my new iMac so decided to format the HDD on the MacBook and try install using these, however I have got the error: Cannot install Mac OS X on this computer. I have read that this could be as a result of using the disks which are for the iMac and not the MacBook. If I were to buy a Snow Leopard disk from the apple store would this work instead? Do I have any other options? Any advice would be appreciated.