It seems that the late 2008 MacBook and MacBook Pros can accept up to 8 GB of RAM. Apple issued a firmware update in 2009 that actually allows these machines to use 8 GB.What does this mean? Well, it means that older MacBooks and MacBook Pros users will be able to upgrade their computers to run faster, and more efficiently.
Original tests had indicated that the machines would run with 8 GB, but if an application attempted to use the entire amount of memory, the computer would crash. But apparently when Apple issued a firmware update for these machines in 2009, this problem seemed to go away. The new EFI (similar to BIOS on IBM PCs) update was released, but it was said to remove an issue where the optical drive made too much noise on this machine. Nowhere was it listed that this boosted the memory capacity of these machines from 6 to 8 GB.
