After extremely rapid delivery - as has already done a lot, I think - I run the Macbook 13 '' Late in 2008 I run this Samsung 4GB module successfully together with an additional 2GB module and have full information on the system 6GB memory. I had read on the internet some reports who thought this would be possible, although it is particularly contradictory to the officially stated by Apple 4GB limit. In Macbook manual a misprint is beyond: the memory modules have not surprisingly unusual 200 but the usual 204 poles - can see how easy that was also installed at the store (in the German version.).