Apple iMac 21.5 inch

21.5-inch  

21.5-inch with Retina display

Apple iMac 27.5 inch

27-inch with Retina display

Display1
21.5-inch display 21.5-inch display Retina 4k display 27-inch Retina 5k display
1920*1080 resolution 4096*2304 resolution 5120*2880 resolution
Processor
Dual-core or quad-core Intel Core i5 Quad-core Intel Core i5 Quad-core Intel Core i5
Memory
8GB 8GB 8GB
Strorage2
1TB hard drive 1TB hard drive 1TB hard drive or
1TB or 2TB Fusion Drive
Intel HD Graphics 6000 or Intel Iris Pro Graphics 6200 AMD Radeon R9 M380, M390 or
Intel Iris Pro Graphics 6200 M395 with 2GB GDDR5
Wireless
802.11ac Wi-Fi 802.11ac Wi-Fi 802.11ac Wi-Fi
Bluetooth 4.0 Bluetooth 4.0 Bluetooth 4.0
Connections and Expansion
Two Thunderbolt 2 ports Two Thunderbolt 2 ports Two Thunderbolt 2 ports
Four USB 3 ports Four USB 3 ports Four USB 3 ports
SDXC card slot SDXC card slot SDXC card slot
Camera
FaceTime HD Camera FaceTime HD Camera FaceTime HD Camera
Keyboard and Mouse
Magic Keyboard Magic Keyboard Magic Keyboard
Magic Mouse 2 Magic Mouse 2 Magic Mouse 2

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