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21.5-inch (54.61 cm)
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21.5-inch (54.61 cm)
with Retina display
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27-inch (68.58 cm)
with Retina display
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| Display1 | | 21.5-inch (54.61 cm) display | 21.5-inch (54.61 cm) display Retina 4k display | 27-inch (68.58 cm) Retina 5k display | | 1920*1080 resolution | 4096*2304 resolution | 5120*2880 resolution | | 500 nits brightness | 500 nits brightness |
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| Processor | | Dual-core Intel Core i5 | Quad-core Intel Core i5 | Quad-core Intel Core i5 |
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| Memory | |
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| Storage2 | | 1TB hard drive | 1TB hard drive or
1TB Fusion Drive | 1TB or 2TB Fusion Drive |
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| Graphics | | Intel Iris Plus Graphics 640 | Radeon Pro 555 or 560 | Radeon Pro 570, 575 or 580 |
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| Wireless | | 802.11ac Wi-Fi | 802.11ac Wi-Fi | 802.11ac Wi-Fi | | Bluetooth 4.2 | Bluetooth 4.2 | Bluetooth 4.2 |
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| Connections and Expansion | | Two Thunderbolt 3 (USB-C) ports | Two Thunderbolt 3 (USB-C) ports | Two Thunderbolt 3 (USB-C) ports | | Four USB 3 ports | Four USB 3 ports | Four USB 3 ports | | SDXC card slot | SDXC card slot | SDXC card slot |
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| Camera | | FaceTime HD Camera | FaceTime HD Camera | FaceTime HD Camera |
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| Keyboard and Mouse | | Magic Keyboard | Magic Keyboard | Magic Keyboard | | Magic Mouse 2 | Magic Mouse 2 | Magic Mouse 2 |
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