I have recently upgraded the memory on my mid-2010 MBP 13" model from 4gb to 8gb. Perhaps one of the easiest and cheapest upgrades one could do on their computer. Literally less than 10 minutes done and up and running. My wife has the white, 2010 macbook. By some miracle of chance; would the 4gb that I took out work in hers? I think I know the answer but it doesn't hurt to ask.