Options: Choose either an 11.6 or 13.3" screen size Electronics: Get a refurbished Apple Macbook Air. 11" operating system: Mac OS 10.15 Catalina, released 2013. 13" operating system: Mac OS Big Sur, released 2014. Memory: 4GB RAM size with a 128GB SSD hard drive capacity. Processor: Intel Core i5 4th Generation. Features: Built-in microphone and webcam, backlit keyboard, Bluetooth, multi-touch trackpad and camera. Apple Macbook Air 128GB | 4GB | Living Social