The product is discount for sale during china 2016 National's Day , purchase to visit : www.fondsale.com Operating System: Mac OS X Mavericks CPU family: Intel Core i5 3-generation family CPU Type: Intel Core i5 3210M CPU frequency: 2.5GHz Core frequency: 3100MHz Bus Specifications: DMI 5 GT / s Three cache: 3MB Core Architecture: Haswell Core / thread count: dual-core / four thread Process Technology: 22nm Instruction Set: AVX2,64bit Power: 15W Memory Capacity: 4GB (4GB × 1) Memory Type: DDR3LP (low-power version) 1600MHz The maximum memory capacity: 16GB Hard disk capacity: 500GB Hard to describe: 5400 rpm Drive Type: no built-in optical drive Touch screen: does not support touch Screen size: 13.3 inches Aspect ratio: 16: 9 Screen Resolution: 1280x800 Screen technology: LED backlight Graphics Type: Core Graphics Graphics chip: Intel GMA HD 4000