This listing is for a late 2010 model Apple MacBook Air with 13" display, 1.8 GHz Intel Core 2 Duo processor, 4GB RAM, and 128GB flash storage. Comes with an Apple 45w MagSafe power adapter. Currently running OSX 10.10.5 Yosemite. This computer is in excellent cosmetic condition. The battery reads "Service Battery," however it starts up and runs just fine on the power adapter.