Apple iMac MK452LL/A 21.5-Inch Retina 4K Desktop - Mac OS X El Capitan - 3.1GHz quad-core Intel Core i5 w/ 1 Year Apple Warranty Form Factor: Desktop Graphics: Intel Iris Pro Graphics 6200 Type: Student / Home Office Usage: Consumer Processor: 3.1GHz quad-core Intel Core i5 Processor Main Features: Turbo Boost up to 3.6GHz Memory: 8GB (Configurable to 16GB) of 1867 MHz LPDDR3 Onboard Memory Storage: 1TB (5400-rpm) Hard Drive