Apple iMac MC812LL/A Intel Core i5-2500S X4 2.7GHz 4GB 1TB DVD+/-RW 21.5'' (Silver) Intel Core i5-2500S 2.7GHz; 1000GB SATA; 4GB DDR3 21.5" LED; 1920 x 1080; AMD Radeon HD 6770 Graphics 802.11A,802.11B,802.11G,802.11N; Bluetooth 2.1 + EDR All-in-One; SuperMulti-DVD Burner; Apple Mac OS X 10.6 Dedicated AMD Radeon HD 6770 Graphics (512MB Dedicated Video Memory)