Apple Mac Pro MD771LL/A Desktop (OLDER VERSION) (Discontinued by Manufacturer) Two 2.4 GHz 6-Core Intel Xeon Processors 12 GB of 1333 MHz DDR3 ECC SDRAM (6 x 2 GB DIMMs) 1 TB Serial ATA Hard Drive (3Gb/s; 7200 rpm) ATI Radeon HD 5770 Graphics with 1 GB of GDDR5 Memory Mac OS X v10.8 Mountain Lion Operating System