MacPro 2007 Intel(R)CPU X5365 @3.0GHz(2 PROCESSORS) RAM 13 GB( ADDITIONAL 4X4 RAM 4GB IS NOT WORKING) BLUE TOOTH, AIR WIFI, EXTRA 3 CADDY TRAY SLED,WINDOWS 10 PRO AND MacOS OS X EI Capitan MAC PRO 2,1(EARLY 2007)3.0GHz