The MacBook is built with the Intel-based Processor. It has two memory sockets and can be upgraded to 2-4GBs 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. Dates in the table below are based on the production start date not necessarily when your actual machine was manufactured. You can find the beginning of production by adding your device to our ID Your Mac page and looking at the beginning of the Production date range.
|Model||Standard Memory||Maximum Memory||Memory Expansion||Memory Sizes||Memory Type|
|A1181 (Core Duo)||512MB (256MBx2)||2GB||Two Slots||256MB | 512MB | 1GB||667MHz PC2-5300 DDR2|
|A1181 (Early Core 2 Duo)||512MB (256MBx2)||3GB||Two Slots||256MB | 512MB | 1GB | 2GB||667MHz PC2-5300 DDR2|
|A1181 (Late Core 2 Duo)||2GB (1GBx2)||6GB||Two Slots||256MB | 512MB | 1GB | 2GB | 4GB||800MHz PC2-6400 DDR2|
|A1278||2GB (1GBx2)||6GB||Two Slots||2GB | 4GB||1066MHz PC3-8500 DDR3|
|A1342 (Polycarbonate)||2GB (1GBx2)||8GB||Two Slots||2GB||1066MHz PC3-8500 DDR3|