I have used Omni Technologies in the past for my RAM and they are excellent. If you go to www.ramseeker.com, and put in the MacBook, several vendors will pop up, as will Omni. There price is $76.99 for 1 GB. Click on the price and you will be sent to their website where you process the order. This is the best price I have found, and from my past experience, this RAM works every bit as good as the Apple RAM.