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 4-generation family CPU Type: Intel Core i5 4278U CPU frequency: 2.6GHz 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: 28W Memory capacity: 8GB (8GB × 1)