Display

• 27-inch (diagonal) Retina 5K display with IPS technology
• 5120‑by‑2880 resolution with support for millions of colors

Processor

• 3.2GHz
  3.2GHz quad‑core Intel Core i5 (Turbo Boost up to 3.6GHz)

Memory

• 8GB (two 4GB) of 1867MHz DDR3 memory; four SO-DIMM slots, user accessible
  Configurable to 16GB or 32GB

Storage¹

• 3.2GHz
  1TB (7200-rpm) hard drive
  

Graphics

• 3.2GHz
  AMD Radeon R9 M380 graphics processor with 2GB of GDDR5 memory

Video Support and Camera

• FaceTime HD camera
• Simultaneously supports full native resolution on the built-in display and up to two 4096-by-2160 external displays or one 5120-by-2880 dual-cable external display
• Support for extended desktop and video mirroring modes

Audio

• Stereo speakers
• Dual microphones
• 3.5 mm headphone jack
  • Headphone/optical digital audio output (minijack)
  • 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 2 ports
  • Mini DisplayPort output
  • Support for HDMI, DVI, VGA, and dual-link DVI (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 4.0 wireless technology

Size and Weight

• 27-inch iMac
  Height: 20.3 inches (51.6 cm)
  Width: 25.6 inches (65.0 cm)
  Stand depth: 8 inches (20.3 cm)
  Weight: 21 pounds (9.54 kg)²

Electrical and Operating Requirements

• 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 95% noncondensing
• Operating altitude: tested up to 10,000 feet