iMac - Technical Specifications

Display

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 1 billion colours
500 nits brightness
Wide colour (P3)

Processor

2.3GHz

2.3GHz dual‑core Intel Core i5, Turbo Boost up to 3.6GHz

3.6GHz

3.6GHz quad‑core Intel Core i3

3.0GHz

3.0GHz 6‑core Intel Core i5 (Turbo Boost up to 4.1GHz)

Memory

8GB of 2133MHz DDR4 memory

8GB of 2400MHz DDR4 memory

8GB of 2666MHz DDR4 memory

Storage1

256GB

256GB SSD

256GB

256GB SSD

256GB

256GB SSD

Graphics

Intel Iris Plus Graphics 640

Radeon Pro 555X with 2GB of GDDR5 
memory

Radeon Pro 560X with 4GB of GDDR5 
memory

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

Connections and Expansion

3.5mm 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

Input

Magic Keyboard

Magic Mouse 2

Configurable with Magic Keyboard with Numeric Keypad

Configurable with Magic Trackpad 2

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

21.5-inch iMac

Height: 45.0 cm (17.7 inches)

Width: 52.8 cm (20.8 inches)

Stand depth: 17.5 cm (6.9 inches)

Weight: 5.44 kg (12.0 pounds)2

21.5-inch iMac with Retina 4K display

Height: 45.0 cm (17.7 inches)

Width: 52.8 cm (20.8 inches)

Stand depth: 17.5 cm (6.9 inches)

Weight: 5.48 kg (12.1 pounds)2

Electrical and Operating Requirements

Line voltage: 100–240V AC

Frequency: 50Hz to 60Hz, single phase

Operating temperature: 10° to 35° C (50° to 95° F)

Relative humidity: 5% to 90% non-condensing

Operating altitude: tested up to 5,000 metres (16,400 feet)

Limited Warranty and Service

Your iMac comes with 90 days of free telephone technical support and a one-year limited warranty. For more information, click here.

In the Box

iMac or
iMac with Retina 4K display

Magic Keyboard

Magic Mouse 2

Power lead

Lightning to USB Cable

Polishing cloth

Operating System

macOS

macOS is the operating system that powers every Mac. macOS Catalina gives you more of everything you love about Mac. So you can take everything you do above and beyond.

Learn more

Accessibility

Accessibility features help people with disabilities get the most out of their new iMac. With built-in support for vision, hearing, mobility and learning, you can create and do amazing things.

Features include:

  • VoiceOver
  • Zoom
  • Increase Contrast
  • Reduce Motion
  • Siri and Dictation
  • Switch Control
  • Closed Captions
  • Text to Speech
Built-in Apps3
  • Photos
  • iMovie
  • GarageBand
  • Pages
  • Numbers
  • Keynote
  • Siri
  • Safari
  • Mail
  • FaceTime
  • Messages
  • Maps
  • Stocks
  • Home
  • Voice Memos
  • Notes
  • Calendar
  • Contacts
  • Reminders
  • Photo Booth
  • Preview
  • Music
  • Books
  • App Store
  • TV
  • Time Machine
  • Podcasts
  • Find My
  • QuickTime Player

iMac and the Environment

We take responsibility for the environmental footprint of our products throughout their life cycle.

The 21.5-inch iMac with Retina 4K display is designed with the following features to reduce its environmental impact:4

Made with better materials

  • Enclosure made with recyclable, low-carbon aluminium
  • 50% or more recycled plastic in multiple components

Energy efficient

  • Meets ENERGY STAR requirements

Smarter chemistry

  • Arsenic-free display glass
  • Mercury-free LED-backlit display
  • BFR-, PVC-5 and beryllium-free

Green manufacturing

  • Final assembly supplier sites do not generate any waste sent to landfill6

Responsible packaging

  • 100% of virgin wood fibre comes from responsibly managed forests
Display

Retina 5K display

27-inch (diagonal) Retina 5K display
5120x2880 resolution with support for 1 billion colours
500 nits brightness
Wide colour (P3)
True Tone technology
Configurable with nano-texture glass

Processor

3.1GHz

3.1GHz 6‑core 10th-generation Intel Core i5, Turbo Boost up to 4.5GHz

3.3GHz

3.3GHz 6‑core 10th-generation Intel Core i5, Turbo Boost up to 4.8GHz

3.8GHz

3.8GHz 8‑core 10th-generation Intel Core i7, Turbo Boost up to 5.0GHz

Memory

8GB (two 4GB) of 2666MHz DDR4 memory; four SO-DIMM slots, user accessible

8GB (two 4GB) of 2666MHz DDR4 memory; four SO-DIMM slots, user accessible

8GB (two 4GB) of 2666MHz DDR4 memory; four SO-DIMM slots, user accessible

Storage1

256GB

256GB SSD

512GB

512GB SSD

512GB

512GB SSD

Graphics

Radeon Pro 5300 with 4GB of GDDR6 memory

Radeon Pro 5300 with 4GB of GDDR6 memory

Radeon Pro 5500 XT with 8GB of GDDR6 memory

Video Support and Camera

1080p FaceTime HD camera

Simultaneously supports full native resolution on the built-in display at 1 billion colours and:

One 6016x3384 (6K) external display at 60Hz with support for 1 billion colours, or

Two 6016x3384 (6K) external displays at 60Hz with support for 1 billion colours (requires Radeon Pro 5700 or Radeon Pro 5700 XT), or

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

Studio-quality three-mic array with high signal-to-noise ratio and directional beamforming

3.5mm headphone jack

Support for “Hey Siri”

Connections and Expansion

3.5mm headphone jack

SDXC card slot (UHS‑II)

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)

Configurable to 10Gb Ethernet with support for 1Gb, 2.5Gb, 5Gb and 10Gb Ethernet

Kensington lock slot

Input

Magic Keyboard

Magic Mouse 2

Configurable with Magic Keyboard with Numeric Keypad

Configurable with Magic Trackpad 2

Wireless

Wi‑Fi

802.11ac Wi‑Fi wireless networking
IEEE 802.11a/b/g/n compatible

Bluetooth

Bluetooth 5.0 wireless technology

Size and Weight

Height: 51.6 cm (20.3 inches)

Width: 65.0 cm (25.6 inches)

Stand depth: 20.3 cm (8.0 inches)

Weight: 8.92 kg (19.7 pounds)2

Electrical and Operating Requirements

Line voltage: 100–240V AC

Frequency: 50Hz to 60Hz, single phase

Operating temperature: 10° to 35° C (50° to 95° F)

Relative humidity: 5% to 90% non-condensing

Operating altitude: tested up to 5,000 metres (16,400 feet)

Limited Warranty and Service

Your iMac comes with 90 days of free telephone technical support and a one-year limited warranty. For more information, click here.

In the Box

iMac with Retina 5K display

Magic Keyboard

Magic Mouse 2

Power lead

Lightning to USB Cable

Polishing cloth

Operating System

macOS

macOS is the operating system that powers every Mac. macOS Catalina gives you more of everything you love about Mac. So you can take everything you do above and beyond.

Learn more

Accessibility

Accessibility features help people with disabilities get the most out of their new iMac. With built-in support for vision, hearing, mobility and learning, you can create and do amazing things.

Features include:

  • VoiceOver
  • Zoom
  • Increase Contrast
  • Reduce Motion
  • Siri and Dictation
  • Switch Control
  • Closed Captions
  • Text to Speech
Built-in Apps3
  • Photos
  • iMovie
  • GarageBand
  • Pages
  • Numbers
  • Keynote
  • Siri
  • Safari
  • Mail
  • FaceTime
  • Messages
  • Maps
  • Stocks
  • Home
  • Voice Memos
  • Notes
  • Calendar
  • Contacts
  • Reminders
  • Photo Booth
  • Preview
  • Music
  • Books
  • App Store
  • TV
  • Time Machine
  • Podcasts
  • Find My
  • QuickTime Player

iMac and the Environment

We take responsibility for the environmental footprint of our products throughout their life cycle.

The 27-inch iMac with Retina 5K display is designed with the following features to reduce its environmental impact:4

Made with better materials

  • 100% recycled tin in the solder of the main logic board
  • Enclosure made with recyclable, low-carbon aluminium
  • 60% recycled plastic in multiple components

Energy efficient

  • Meets ENERGY STAR requirements

Smarter chemistry

  • Arsenic-free display glass
  • Mercury-free LED-backlit display
  • BFR-, PVC-5 and beryllium-free

Green manufacturing

  • Final assembly supplier sites do not generate any waste sent to landfill6
  • All final assembly suppliers are transitioning to 100% renewable energy for Apple production

Responsible packaging

  • 100% of virgin wood fibre comes from responsibly managed forests

Find the right iMac for you.

Compare all Mac models

21.5‑inch iMac

  • Up to 21.5-inch Retina 4K display
  • Up to 6-core Intel Core i7 processor
  • Up to 32GB memory
  • Up to 1TB SSD storage
  • Up to Radeon Pro Vega 20 with 4GB of HBM2 memory
New

27‑inch iMac

  • 27-inch Retina 5K display
  • Up to 10-core Intel Core i9 processor
  • Up to 128GB memory
  • Up to 8TB SSD storage
  • Up to Radeon Pro 5700 XT with 16GB of GDDR6 memory