Display¹

21.5-inch display

1920-by-1080 resolution

21.5-inch Retina 4K display

4096-by-2304 resolution

500 nits brightness

27-inch Retina 5K display

5120-by-2880 resolution

500 nits brightness

Processor

Dual-core Intel Core i5

Quad-core Intel Core i5

Quad-core Intel Core i5

Memory

8GB

8GB

8GB

Storage²

1TB hard drive

1TB hard drive or 1TB Fusion Drive

1TB or 2TB Fusion Drive

Graphics

Intel Iris Plus Graphics 640

Radeon Pro 555 or 560

Radeon Pro 570, 575, or 580

Wireless

802.11ac Wi-Fi

Bluetooth 4.2

802.11ac Wi-Fi

Bluetooth 4.2

802.11ac Wi-Fi

Bluetooth 4.2

Connections and Expansion

Two Thunderbolt 3 (USB-C) ports

Four USB 3 ports

SDXC card slot

Two Thunderbolt 3 (USB-C) ports

Four USB 3 ports

SDXC card slot

Two Thunderbolt 3 (USB-C) ports
Four USB 3 ports

SDXC card slot

Camera

FaceTime HD camera

FaceTime HD camera

FaceTime HD camera

Keyboard and Mouse

Magic Keyboard

Magic Mouse 2

Magic Keyboard

Magic Mouse 2

Magic Keyboard

Magic Mouse 2

Features listed are standard configurations.

1. Display size is measured diagonally.

2. 1TB = 1 trillion bytes; actual formatted capacity less.