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iMac (Retina 4K, 21,5-inch, 2017) - 3,4‑GHz i5 4‑coreprocessor - 1TB SSD Drive - AMD Radeon Pro 560 4GB - Upgreatest
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iMac receives major update featuring more powerful graphics, faster processors, Thunderbolt 3 and brighter displays - Apple
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Got an iMac 4K or iMac 5K? This is how you can change to full 4k or 5k resolutions – which macOS doesn't allow you by default! – Swiss Mac User
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