• Retina 5K display
• 27-inch (diagonal) Retina 5K display
• 5120?by?2880 resolution with support for one billion colors
• 500 nits brightness
• Wide color (P3)

Processor

• 3.4GHz
  3.4GHz quad?core Intel Core i5 (Turbo Boost up to 3.8GHz)

Memory

• 8GB (two 4GB) of 2400MHz DDR4 memory; four SO-DIMM slots, user accessible

Storage¹

1TB Fusion Drive
Configurable to 2TB Fusion Drive or 256GB, 512GB, or 1TB SSD

Video Support and Camera

• FaceTime HD camera
• Simultaneously supports full native resolution on the built-in display at 1 billion colors 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
  • Support for Apple iPhone headset with microphone

Connections and Expansion

• 3.5 mm headphone jack
• SDXC card slot
• Four USB 3 ports (compatible with USB 2)
• Two Thunderbolt 3 (USB-C) ports with support for:
  • DisplayPort
  • Thunderbolt (up to 40 Gbps)
  • USB 3.1 Gen 2 (up to 10 Gbps)
  • 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: 20.3 inches (51.6 cm)
• Width: 25.6 inches (65.0 cm)
• Stand depth: 8 inches (20.3 cm)
• Weight: 20.8 pounds (9.44 kg)²