Apple MacBook Air 13.3-Inch Laptop 1.7GHz Core i5 / 4GB DDR3 Memory / 128GB SSD (Solid State Drive) / ThunderBolt / OS X 10.10 Yosemite Apple MacBook Air A1369 Mid 2011 Core i5 2557M 1.7GHz 4GB 128GB SSD Webcam