The iMac Core i5 / 2.7 with 21.5-inch screen introduced in September, 2013, got the faster state of the art quad core processor – Intel Core-i5 Ivy Bridge with Haswell / Crystalwell microarchitecture. The design is similar to the iMacs of 2012. This is the all-in-one desktop computer in an ultra-thin (5 mm depth at the edges) all-aluminum unibody casing behind the 21.5-inch LED-backlit IPS screen with cover glass fully laminated to the LCD and anti-reflective coating. There’s a bulge though in the center of the back panel to house all the hardware. The computer is mounted on an aluminum stand with a slightly tapered foot and an adjusting hinge. The iMac Core i5-inch 2.7 21.5-inch (late 2013) features a quad core 2.7 GHz Intel Core i5 I5- 4570R processor (Haswell / Crystalwell), with four independent processor cores on a single chip, DMI system bus and an integrated graphics core, 8 GB of RAM, a 1TB GB (5400 RPM) hard drive, an SD memory slot card reader, an integrated Intel Iris Pro 5200 graphics processor with 128 MB of “Crystalwell” embedded DRAM and 1.5 GB of shared system memory, a built-in FaceTime HD webcam and stereo speakers, as well as two “Thunderbolt” ports and 4 USB 3.0 ports. It also has built-in AirPort Extreme (802.11g) and Bluetooth 4.0. The cooling system is CPU controlled and the in-built speakers are mounted beneath the 21.5-inch screen for the clearer less distorted sound to bounce off the desk or other surface. The speakers’ grills also work as the vent ones. The iMac Core i5 2.7 21.5-inch (late 2013) is shipped with a compact aluminum Apple Wireless Keyboard and either with a “Magic Mouse” or a traditional wired Apple Mouse or a multi-touch Magic Trackpad.