Operating System: Find more information on the operating system and latest version available on your product with our refurbished tech guide page. RAM: Choose from 4GB or 8GB. Processor: With a 3.06 GHz Intel "Core 2 Duo" processor (E7600), with two independent processor "cores" on a single silicon chip. Apple iMac: Get a refurbished Apple iMac A1311. Accessories: Includes a compact Apple wireless keyboard and a multi-touch 'Magic Mouse'. HDD: With 250GB, 500GB or 1TB of HDD. Screen: 21.5" glossy 16:9 LED-backlit TFT Active Matrix LCD display. | 21.5" Apple iMac A1311 Core 2 Duo - 4GB | Wowcher