Operating system: Find more information on the operating system and latest version available on your product with our refurbished tech guide page. Apple iMac: Grab yourself a refurbished Apple iMac. Specification options: With a choice of 6 setups - see full details for guide/price list. Includes: Purchase comes with a wireless keyboard and mouse. | 21.5" Apple iMac w/ Wireless Keyboard & Mouse | Wowcher