The stunning all-in-one iMac features a beautiful 21.5-inch widescreen display, fourth generation quad-core Intel Core processors and Iris graphics make it the most powerful iMac yet. And it comes as standard with 8GB memory, a 1TB hard drive and advanced, high-speed connections, including two Thunderbolt ports, four USB 3 ports and 802.11ac Wi-Fi. All in an impossibly thin enclosure that's only 5mm at the edge.