High-performance MacBook Air with macOS Sierra, 128GB storage, and 4GB memory. - Model: MacBook Air - OS: macOS Sierra - Storage: 128GB - Memory: 4GB Priority will be given to those who want to purchase individual parts. The letter "a" is not functioning. The battery is broken and can only be used while charging. There are scratches and other issues. Therefore, it is considered junk. Returns and refunds are not accepted. The only included accessory is the main unit. Please note that there is no box. Thank you for viewing.