Retina 4K display

21.5-inch (diagonal) Retina 4K display

4096-by-2304 resolution with support for one billion colors

500 nits brightness

Wide color (P3)

3.6GHz

• 3.6GHz quad‑core Intel Core i3

• Configurable to 3.2GHz 6-core Intel Core i7, Turbo Boost up to 4.6GHz

3.0GHz

• 3.0GHz 6-core Intel Core i5 (Turbo Boost up to 4.1GHz)

• Configurable to 3.2GHz 6-core Intel Core i7, Turbo Boost up to 4.6GHz

3.6GHz

• 8GB of 2400MHz DDR4 memory

• Configurable to 16GB or 32GB

3.0GHz

• 8GB of 2666MHz DDR4 memory

• Configurable to 16GB or 32GB

3.6GHz

• 256GB SSD

• Configurable to 1TB Fusion Drive

3.0GHz

• 256GB SSD

• Configurable to 1TB Fusion Drive

3.6GHz

• Radeon Pro 555X with 2GB of GDDR5 memory

3.0GHz

• Radeon Pro 560X with 4GB of GDDR5 memory

• Configurable to Radeon Pro Vega 20 with 4GB of HBM2 memory

FaceTime HD camera

Simultaneously supports full native resolution on the built-in display at millions of colors (21.5-inch) or 1 billion colors (21.5-inch 4K) and:

• One 5120‑by‑2880 (5K) external display at 60Hz with support for 1 billion colors, or

• Two 3840-by-2160 (4K UHD) external displays at 60Hz with support for 1 billion colors, or

• Two 4096‑by‑2304 (4K) external displays at 60Hz with support for millions of colors

Thunderbolt 3 digital video output

Native DisplayPort output over USB‑C

Thunderbolt 2, HDMI, DVI, and VGA output supported using adapters (sold separately)

Stereo speakers

Microphone

3.5 mm headphone jack

3.5 mm headphone jack

SDXC card slot

Four USB-A ports

Two Thunderbolt 3 (USB-C) ports with support for:

• DisplayPort

• Thunderbolt (up to 40Gb/s)

• USB 3.1 Gen 2 (up to 10Gb/s)

• Thunderbolt 2, HDMI, DVI, and VGA supported using adapters (sold separately)

10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)

Kensington lock slot

Magic Keyboard

Magic Mouse 2

Configurable with Magic Keyboard with Numeric Keypad

Configurable with Magic Trackpad 2

Wi-Fi

• 802.11ac Wi-Fi wireless networking

• IEEE 802.11a/b/g/n compatible

Bluetooth

• Bluetooth 4.2 wireless technology

Height: 17.7 inches (45.0 cm)

Width: 20.8 inches (52.8 cm)

Stand depth: 6.9 inches (17.5 cm)

Weight: 12.1 pounds (5.48 kg)²

Line voltage: 100–240V AC

Frequency: 50Hz to 60Hz, single phase

Operating temperature: 50° to 95° F (10° to 35° C)

Relative humidity: 5% to 90% noncondensing

Operating altitude: tested up to 16,400 feet (5000 meters)