I have a 2009 MacbookPro with two 2GB cards. 1067mhz DDR3. I have two 4GB 1866 cards from a newer exchange. Can I use the 1866 cards in the 2009? It can handle the 8GB total. Intel i5 2.8 core II duo processor. Thanks.
Thanks for the quick response. I reviewed the reference you mention. I don't know if this makes a difference but mine is the 15" with the 2.8 processor. I am not much of a technical person. I'm more of a user. But I did read a response elsewhere that a higher Mhz card would work, but not at the memory card's designed Mhz level - in this case 1066 vs 1866.