Apple iMac ME088LL/A 27-Inch Desktop (OLDEST VERSION) (Discontinued by Manufacturer) 3.2 GHz Quad-Core Intel Core i5 Processor (Turbo Boost up to 3.6 GHz) with 6MB L3 Cache 1 TB (7200-rpm) Hard Drive, 8GB (two 4GB) of 1600MHz DDR3 memory; Four User-Accessible SO-DIMM Slots 27-inch (diagonal) LED-backlit Display with IPS Technology; 2560-by-1440 Resolution NVIDIA GeForce GT 755M Graphics Processor with 1 GB of GDDR5 Memory Mac OS X Yosemite