The 21.5" iMac Desktop Computer is an all-in-one desktop computer with an ultra-slim unibody design. Measuring at just 5mm at its edges, the iMac has 40% less volume than its predecessor. The body of the iMac isn't the only thing that got thinner. The LCD display is now 5mm thinner, and Apple also removed a 2mm gap between the LCD panel and the glass to save even more space.

 Key Features:

• 2.7GHz Intel Core i5 Quad-Core
• 4GB, 8GB, 16GB of 1600Hz DDR3 RAM
• 750GB, 1TB, 2TB, 4TB 5400rpm Hard Drive
• nVIDIA GeForce GT 640M Graphics (512MB)
• 21.5" HD LED-Backlit IPS Display
• 1920 x 1080 Native Resolution
• 802.11a/b/g/n Wi-Fi, Bluetooth 4.0
• Thunderbolt, USB 3.0, SDXC Card Reader
• 720p FaceTime HD Camera, Dual Mics
• Mac OS X 10.8 Mountain Lion (64-bit)
• Year – 2012
• Model -  MD093LL/A
• Warranty Information