21.5-inch (diagonal) LED-backlit display with IPS technology;
1920‑by‑1080 resolution with support for millions of colors

1.6GHz dual‑core Intel Core i5
8GB of 1867MHz LPDDR3 onboard memory
1TB (5400-rpm) hard drive
Intel HD Graphics 6000
Magic Keyboard
Magic Mouse 2
802.11ac Wi-Fi wireless networking
Bluetooth 4.0 wireless technology
macOS Sierra

21.5-inch (diagonal) LED-backlit display with IPS technology;
1920‑by‑1080 resolution with support for millions of colors

2.8GHz quad‑core Intel Core i5
8GB of 1867MHz LPDDR3 onboard memory
1TB (5400-rpm) hard drive
Intel Iris Pro Graphics 6200
Magic Keyboard
Magic Mouse 2
802.11ac Wi-Fi wireless networking
Bluetooth 4.0 wireless technology
macOS Sierra

Retina 4K display
21.5-inch (diagonal) Retina 4K display with IPS technology;
4096-by-2304 resolution with support for millions of colors

3.1GHz quad-core Intel Core i5
8GB of 1867MHz LPDDR3 onboard memory
1TB (5400-rpm) hard drive
Intel Iris Pro Graphics 6200
Magic Keyboard
Magic Mouse 2
802.11ac Wi-Fi wireless networking
Bluetooth 4.0 wireless technology
macOS Sierra

Retina 5K display
27-inch (diagonal) Retina 5K display with IPS technology;
5120‑by‑2880 resolution with support for millions of colors

3.2GHz quad‑core Intel Core i5
8GB (two 4GB) of 1867MHz DDR3 memory; four SO-DIMM slots, user accessible
1TB (7200-rpm) hard drive
AMD Radeon R9 M380 graphics processor with 2GB of GDDR5 memory
Magic Keyboard
Magic Mouse 2
802.11ac Wi-Fi wireless networking
Bluetooth 4.0 wireless technology
macOS Sierra

Retina 5K display
27-inch (diagonal) Retina 5K display with IPS technology;
5120‑by‑2880 resolution with support for millions of colors

3.2GHz quad‑core Intel Core i5
8GB of 1867MHz LPDDR3 onboard memory
1TB Fusion Drive
AMD Radeon R9 M390 graphics processor with 2GB of GDDR5 memory
Magic Keyboard
Magic Mouse 2
802.11ac Wi-Fi wireless networking
Bluetooth 4.0 wireless technology
macOS Sierra

Retina 5K display
27-inch (diagonal) Retina 5K display with IPS technology;
5120‑by‑2880 resolution with support for millions of colors

3.3GHz quad‑core Intel Core i5
8GB of 1867MHz LPDDR3 onboard memory
2TB Fusion Drive
AMD Radeon R9 M395 graphics processor with 2GB of GDDR5 memory
Magic Keyboard
Magic Mouse 2
802.11ac Wi-Fi wireless networking
Bluetooth 4.0 wireless technology
macOS Sierra