The MacBook Pro is built with the Intel-based Processor. It has two memory sockets and can be upgraded to 2-8GBs maximum depending on your model. Memory can be installed one module at a time. Apple recommends that two modules of the same size be installed for maximum performance.
|Model||Standard Memory||Maximum Memory||Memory Expansion||Memory Sizes||Memory Type|
|A1278||2GB/4GB||8GB||Two Slots||2GB | 4GB||1066MHz PC3-8500 DDR3|
|A1278 (Early 2011 and later)||4GB (2GBx2)||8GB||Two Slots||2GB | 4GB||1333MHz PC3-10600 DDR3|