This listing is for a mid-2012 Apple MacBook Air with 11" screen, 1.7 GHz Intel Core i5 processor, 4GB RAM, and 60GB flash storage. Currently running OSX 10.10.5 Yosemite. This computer is in good cosmetic condition, a couple of minor dents on the upper case, and it starts right up and runs great. Comes with an Apple 45w MagSafe 2 power adapter.