Apple iMac MD093LL/A 2.7 GHz Quad-Core Intel Core i5 21.5" Desktop Computer (Refurbished) This Certified Refurbished product has been tested and certified to work and look like new, with minimal to no signs of wear, by a specialized third-party seller approved by Amazon. The product is backed by a minimum 90-day warranty, and may arrive in a generic brown or white box. Accessories may be generic and not directly from the manufacturer. Includes all original accessories plus a 90-day warranty 21.5" LED-backlit display IPS tech 1920x1080 resolution 2.7 GHz quad-core Intel i5 - 1 TB (5400-rpm) hard drive - 8 GB 1600MHz DDR3 memory NVIDIA GeForce GT 640M graphics 512MB GDDR5 - Mac OS X Mountain Lion