Featuring a beautiful 21.5-inch widescreen display and an impossibly thin enclosure that's only 5 mm at the edge, the stunning all-in-one iMac has been updated with a fourth-generation quad-core Intel Core processor - making it the most powerful iMac yet. And it comes standard with 8 GB of memory, a 1 TB hard drive, and advanced, high-speed I/O, including two Thunderbolt ports and four USB 3 ports. The iMac also now supports next generation 802.11ac Wi-Fi. imac 21 The 21.5-inch iMac is just 5mm thin at its edge and features a bright display with 75 percent less reflection (view larger). 80211ac This version of the 21.5-inch iMac (model ME086LL/A) features a 2.7 GHz Intel Core i5 quad-core processor as well as Intel Iris Pro integrated graphics, which delivers discrete graphics-level performance (see full specifications below). It also comes with OS X Mountain Lion and the iLife software suite, which includes the latest versions of iPhoto, iMovie, and GarageBand.