The silver Apple MacBook Air 13.3-inch Laptop is powered by an Intel Core i5 1.4 GHz fourth generation processor. Backed with a 4 GB memory module, this MacBook lets you multi-task with ease. The 128 GB hard drive takes care of all your storage needs. You can install either the Apple Mac OS X 10.8 Mountain Lion or Apple Mac OS X 10.9 Mavericks.