Apple has updated the entire iMac family, bringing a Retina 4K display to the 21.5-inch iMac for the first time and the Retina 5K display to every 27-inch iMac. The revved all-in-ones also sport more powerful processors and graphics, two Thunderbolt 2 ports and new storage options.
The 21.5-inch iMac is available with the all-new Retina 4K display featuring 4096 x 2304 resolution and 9.4 million pixels, 4.5 times more than the standard 21.5-inch iMac display. Every 27-inch iMac now comes with a Retina 5K display with 14.7 million pixels, seven times more pixels than an HD display.
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