MacBookAir 2011 (mid) Core i5 1.6Ghz 11 inch

System Information

Manufacturer Specifications:

Memory Sockets: 0 slot(s)
Maximum Memory: Supports up to 4GB
Model Id: MacBookAir4,1

Product Notes:

Apple sold a 2GB version as model MC968X/A and a 4GB version as model MC969X/A. The 2GB version can be custom ordered with 4GB. It cannot be upgraded later.