• 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

• 16GB (two 8GB) of 2400MHz DDR3 memory; four SO-DIMM slots, user accessible

Storage¹

 256GB, 

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

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