Apple MacBook Pro ME294LL/A 15.4-Inch Laptop with Retina Display (OLD VERSION) 2.3 GHz Intel Core-i7 quad-core processor (Turbo Boost up to 3.5GHz) with 6MB shared L3 cache 512 GB PCIe-based flash storage; 16GB 1600MHz DDR3L onboard memory 15.4-inch (diagonal) Retina display, 2880x1800 pixel Resolution; LED-backlit with IPS technology NVIDIA GeForce GT 750M with 2GB of GDDR5 memory Mac OS X Mavericks, Up to 8 hours of battery life