21.5-inch iMac could get its Retina 4K upgrade in November

At 4K resolution, Apple’s smaller all-in-one would match the 27-inch 5K iMac in pixel density.
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Jared Newman covers personal technology from his remote Cincinnati outpost. He also publishes two newsletters, Advisorator for tech advice and Cord Cutter Weekly for help with ditching cable or satellite TV.