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)
2.3GHz
2.3GHz dual‑core Intel Core i5, Turbo Boost up to 3.6GHz
3.6GHz
3.6GHz quad‑core Intel Core i3
Configurable to 3.2GHz 6‑core Intel Core i7, Turbo Boost up to 4.6GHz
3.0GHz
3.0GHz 6‑core Intel Core i5 (Turbo Boost up to 4.1GHz)
Configurable to 3.2GHz 6‑core Intel Core i7, Turbo Boost up to 4.6GHz
8GB of 2133MHz DDR4 memory
Configurable to 16GB
8GB of 2400MHz DDR4 memory
Configurable to 16GB or 32GB
8GB of 2666MHz DDR4 memory
Configurable to 16GB or 32GB
256GB
256GB SSD
Configurable to 1TB Fusion Drive
256GB
256GB SSD
Configurable to 1TB Fusion Drive, 512GB SSD or 1TB SSD
256GB
256GB SSD
Configurable to 1TB Fusion Drive, 512GB SSD or 1TB SSD
Intel Iris Plus Graphics 640
Radeon Pro 555X with 2GB of GDDR5 memory
Radeon Pro 560X with 4GB of GDDR5 memory
Configurable to Radeon Pro Vega 20 with 4GB of HBM2 memory
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)
Stereo speakers
Microphone
3.5mm headphone jack
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
Magic Keyboard
Magic Mouse 2
Configurable with Magic Keyboard with Numeric Keypad
Configurable with Magic Trackpad 2
Wi‑Fi
802.11ac Wi‑Fi wireless networking
IEEE 802.11a/b/g/n compatible
Bluetooth
Bluetooth 4.2 wireless technology
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
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)
In the United Kingdom, consumers are entitled to a free-of-charge repair or replacement, by the seller, of goods that do not conform with the contract of sale. Under English law, consumers have up to six years from the date of delivery to exercise their rights; however, various factors may impact your eligibility to receive these remedies. For more details, click here.
Your iMac also comes with 90 days of complimentary technical support and a one-year limited warranty from Apple. To learn more about how Apple will service your iMac, click here.
Purchase AppleCare+ to get up to three years of expert technical support and hardware coverage, including up to two incidents of accidental damage protection every 12 months, each subject to an excess fee. For more information, click here.
iMac or
iMac with Retina 4K display
Magic Keyboard
Magic Mouse 2
Power lead
Lightning to USB Cable
Polishing cloth
macOS
macOS is the most advanced desktop operating system in the world. macOS Big Sur introduces a bold new design and major updates to apps — taking macOS to a new level of power and beauty.
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:
- Voice Control
- VoiceOver
- Zoom
- Increase Contrast
- Reduce Motion
- Siri and Dictation
- Switch Control
- Closed Captions
- Text to Speech
Configure your iMac with these options.
Looking for an iMac you can mount on a wall or an adjustable arm? Choose an iMac with a Built‑in VESA Mount Adapter
iMac and the Environment
We take responsibility for the environmental footprint of our products throughout their life cycle. Learn more
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
Apple Trade In
Letting go of your old device is easy with Apple Trade In. If it’s in good shape, you can trade it in for Apple Store credit. If it’s not eligible for credit, we’ll recycle it responsibly at no cost to you. Good for you. Good for the planet.
Learn more
Read the 21.5-inch iMac with Retina 4K display Environmental Report or the 21.5-inch iMac Environmental Report for detailed information on these products’ environmental performance.