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Apple launches new Retina 4K 21.5-inch iMac, all 27-inch iMacs now feature Retina 5K displays - 9to5Mac
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Apple iMac with Retina 4K display MK452B/A All-in-One Desktop Computer, 3.1GHz Quad-core Intel Core i5, 8GB RAM, 1TB, 21.5", Silver
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