Display

• 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)

Video Support and Camera

• 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)

Audio

• Stereo speakers

• Microphone

• 3.5 mm headphone jack

Connections and Expansion

• 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

Wireless

• Wi-Fi

  • 802.11ac Wi-Fi wireless networking

  • IEEE 802.11a/b/g/n compatible

• Bluetooth

  • Bluetooth 4.2 wireless technology

Size and Weight

• 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

Operating System

       macOS

• macOS is the most advanced desktop operating system in the world. macOS Big Sur introduces a bold new design and major updates to apps — taking macOS to a new level of power and beauty.