I have a mid-2009 13" Macbook Pro MB990LL/A. This unit uses DDR3 1066Mhz memory and is listed as supporting up to 8GB of ram. Of course at the time you could not get a single 8GB stick of ram. Does anyone know if these can support 16GB (2 x 8GB) of DDR3 1333Mhz RAM? On a pc or server motherboard often the max ram listed is just the number of slots times the largest available dimm at the time, and faster ram will scale back to the speed of the motherboard. When larger dimms come out you can almost always go higher than the listed specs. If you cannot do this with Apple products, could someone explain what is prohibiting the machine from accepting the larger dimms?