Same design, new insides, better screen: 21.5-inch 4K Retina iMac reviewed

Ars Technica
By Andrew CunninghamOct 13, 2015, 8:30 am366 pts
Andrew Cunningham The new 4K iMac hooked up to an external 4K display. 16 more images in gallery It's been over three years since the very first Mac went Retina, and we're still waiting for every model to get the upgrade. But this year, the scales started to tip in Retina's favor. We got an all-new Retina…

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