Apple iMac MD094LL/A 21.5-Inch Desktop (OLD VERSION) (Discontinued by Manufacturer) 2.9 GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache 1 TB (5400-rpm) hard drive, 8 GB (two 4GB) of 1600MHz DDR3 memory 21.5-inch (diagonal) LED-backlit display with IPS technology; 1920-by-1080 resolution NVIDIA GeForce GT 650M graphics processor with 512MB of GDDR5 memory Mac OS X Mountain Lion