After a few days of the new MacBook’s release from WWDC 2009, people who depended on SATA found that the new MacBooks could only handle 1.5GBps file transfers over SATA, as opposed to the 3GBps speed they were getting before the update.
For those who don’t know, SATA is a type of file transfer mechanism, similar to USB and FireWire. SATA 3.0 has already been demoed, and SATA has become a standard in the hardware community.
Apple has issued an update to those crippled computer allowing speeds up to the 3GBps. The update (Mac Users should know how to do this) is only 3.35MB and can be downloaded via Software Update. You’re free to chose any SSD without that complication holding you back.