Apple iMac MK462LL/A 27-Inch Retina 5K Desktop (3.2 GHz Intel Core i5, 8GB DDR3, 1TB, Mac OS X).

Features:

• 8GB of 1867 MHz DDR3 Onboard Memory 1TB 7200 rpm Hard Drive AMD Radeon R9 M380 graphics processor with 2GB of GDDR5 memory
• 27in Retina 5K Display, 5120 x 2880 Resolution, 3.2 GHz Intel Core i5
• 8GB Onboard Memory (Configurable up to 32GB) 1TB (7200-rpm) Hard Drive AMD Radeon R9 M380 graphics processor with 2GB of GDDR5 memory
• 3.2GHz quad-core Intel Core i5 Turbo Boost up to 3.6GHz