The product is discount for sale during china 2016 National's Day , purchase to visit : www.fondsale.com Operating System: Mac OS X Lion CPU family: Intel Core i5 4-generation family CPU Type: Intel Core i5 4250U CPU frequency: 1.3GHz Core frequency: 2600MHz 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 Maximum memory capacity: 8GB Hard disk capacity: 256GB Hard to describe: SSD Solid State Drive Drive Type: no built-in optical drive Touch screen: does not support touch Screen size: 11.6 inches