The iMac is a series of Macintosh desktop computers offered by Apple Inc. The current Apple iMac features either an Intel Core i5, or Intel Core i7 processor, ATI HD 6750Mgraphics or an ATI Radeon HD 6770M with options to upgrade to the ATI Radeon HD 6970M(27″ model only), and a choice of glossy 21.5″ or 27″ LCD screens.
While previous iMac models had a white polycarbonate enclosure as the iMac G5, the current-generation iMac has an enclosure shaped like Apple’s Cinema Displays and styling reminiscent of the iPhone. Furthermore, the iMac is now made using the same unibody assembly as the MacBook Pro. Previous aluminum iMac models had a black plastic back, but the current model has an aluminum back continuous with the front aluminum plate.