iMac

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Display
iMac 21
iMac 21 4K
  Display
21.5-inch (diagonal) LED-backlit display
1920x1080 resolution with support for millions of colours
Retina 4K display
21.5-inch (diagonal) Retina 4K display
4096x2304 resolution with support for one billion colours
500 nits brightness
Wide colour (P3)
Processor
  • 2.3GHz
    2.3GHz dual-core Intel Core i5 (Turbo Boost up to 3.6GHz)
  • 3.0GHz
    3.0GHz quad-core Intel Core i5 (Turbo Boost up to 3.5GHz)
  • 3.4GHz
    3.4GHz quad-core Intel Core i5 (Turbo Boost up to 3.8GHz)
Memory
  • 8GB of 2133MHz DDR4 onboard memory
  • 8GB of 2400MHz DDR4 onboard memory
  • 8GB of 2400MHz DDR4 onboard memory
Storage1 1TB
  • 1TB (5400-rpm) hard drive
1TB
  • 1TB (5400-rpm) hard drive
1TB
  • 1TB Fusion Drive
Graphics
  • Intel Iris Plus Graphics 640
  • Radeon Pro 555 with 2GB of VRAM
  • Radeon Pro 560 with 4GB of VRAM
Video Support and Camera
  • FaceTime HD camera
  • Simultaneously supports full native resolution on the built-in display at millions of colours (21.5-inch) or 1 billion colours (21.5-inch 4K) and:
  • One 5120x2880 (5K) external display at 60Hz with support for 1 billion colours, or
  • Two 3840x2160 (4K UHD) external displays at 60Hz with support for 1 billion colours, or
  • Two 4096x2304 (4K) external displays at 60Hz with support for millions of colours
  • 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
  • 3.5mm headphone jack
    • Support for Apple iPhone headset with microphone
Connections and Expansion
  • 3.5mm 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: 45.0 cm (17.7 inches)
  • Width: 52.8 cm (20.8 inches)
  • Stand depth: 17.5 cm (6.9 inches)
  • Weight: 5.66 kg (12.5 pounds)2
Operating System
  • macOS Sierra
    macOS is the operating system that powers everything you do on a Mac. macOS Sierra introduces Siri to Mac3 — along with new ways to enjoy your photos and work seamlessly between devices.
In the box
  • 21.5-inch iMac or 21.5-inch iMac with Retina 4K display
  • Magic Keyboard
  • Magic Mouse 2
  • Power cord
  • Lightning to USB Cable
 
  • 1GB = 1 billion bytes; actual formatted capacity less.
  • Weight varies by configuration and manufacturing process.