21″ iMac (Mid 2011)

For 2011, the entire iMac line goes quad-core with Core i5 CPUs (and even faster i7 build-to-order options), moves to Intel’s Sandy Bridge chipset, gets Turbo Boost 2.0 technology, adopts the next generation of AMD Radeon HD graphics processors, and gains the Thunderbolt technology introduced with the Early 2011 MacBook Pro models.

21″ iMac (Late 2009)

The big news: Apple has introduced new screen sizes and a new display aspect ratio. The Late 2009 iMac comes in 21.5″ and 27″ sizes, and the displays have the same 16:9 aspect ratio as HDTV (the Early 2009 iMac had 20″ and 24″ 16:10 aspect ratio displays). The smaller iMac has the same 1920 […]