iMac performance is at an all-time high with new eighth-generation Intel Core processors, Thunderbolt 3 (USB-C) connectivity, and stunning Retina 4K displays with one billion colors and 500 nits of brightness for vibrant images and razor-sharp text.
macOS Mojave, inspired by pros but designed for everyone, with Dark Mode, Stacks, easier screenshots, useful built-in apps, and more
(Manufacturer # MRT42LL/A )
The new iMac models continue to set the gold standard for desktop computers. With a sleek, stylish all-in-one design, stunning Retina display, and 5 mm thin profile, iMac seamlessly and beautifully integrates into any home or office. With up to 8-core processors, lightning fast memory and storage, Radeon Pro Vega graphics options, macOS Mojave, and the Mac App Store, iMac offers powerful performance so pros and consumers alike can speed through even the most demanding workloads.
Bright, colorful Retina displays
Retina displays have a maximum brightness of 500 nits, making iMac perfect in all lighting conditions
Up to 14.7 million pixels and P3 wide color help text appear crisp while photos appear vivid and true to life
The 4K Retina displays support up to 1 billion colors—ideal for photo and video editing
Sleek, all-in-one design
With its stylish aluminum and glass enclosure, iMac beautifully integrates into any environment
Magic Mouse and Magic Keyboard come standard with each iMac and are paired out of the box
8th generation 6-core processors
8th-generation quad-core and 6-core processors with Turbo Boost configurable up to 4.6GHz for the 21.5-inch iMac
Additional cores can handle the most demanding workloads so pros can get work done faster.
Fast memory and storage
High performance 2666MHz DDR4 memory
Up to 32GB on the 21.5-inch
Fusion Drive combines speedy flash storage with a high-capacity hard drive, and is standard on all Retina models except the entry 21.5-inch model
Discrete Radeon Pro graphics
All models include powerful Radeon Pro 500-series discrete graphics with Polaris Architecture
For extreme graphics performance, the 21.5-inch iMac now features a Radeon Pro Vega 20 option
Radeon Pro Vega graphics are paired with HBM2 memory—4GB in the 21.5-inch model
Blazing fast, versatile connectivity
Two Thunderbolt 3 (USB-C) ports deliver charging, data transfer, and video out through a single connector
Four USB 3 ports, SDXC, Ethernet, and a headphone jack are also standard
Retina 4K display 21.5-inch (diagonal) Retina 4K display 4096-by-2304 resolution with support for one billion colors 500 nits brightness Wide color (P3)
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 2666MHz DDR4 memory Configurable to 16GB or 32GB
1TB Fusion Drive Configurable to 256GB, 512GB, or 1TB SSD
Radeon Pro 560X with 4GB of VRAM Configurable to Radeon Pro Vega 20 with 4GB of VRAM
Video Support and Camera
FaceTime HD camera Simultaneously supports full native resolution on the built-in display at millions of colors 1 billion colors (21.5-inch 4K) and: Two 4096-by-2304 (4K) external displays at 60Hz with support for millions of colors Thunderbolt 3 digital video output
Native DisplayPort output over USB-C
Thunderbolt 2, HDMI, DVI, and VGA output supported using adapters (sold separately)
3.5 mm headphone jack
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 3 (USB-C) ports with support for:
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 comes standard with your iMac. It’s wireless and rechargeable (so you won’t be replacing batteries), with an ultracompact, edge-to-edge design that wastes no surface space. It has a stable scissor mechanism, optimized key travel, and a low profile that provide control and comfort. And it pairs immediately with your iMac right out of the box.
Magic Keyboard with Numeric Keypad You get all the functionality of Magic Keyboard, with an extended layout that makes it even easier to work and play. Magic Keyboard with Numeric Keypad includes document navigation controls — page up, page down, home, and end — and full-size arrow keys that are perfect for navigating pro apps, moving through spreadsheets, and playing games.
Magic Mouse 2
Magic Mouse 2 comes standard with your iMac. The design of Magic Mouse 2 lets it glide smoothly across your desk. And since it supports Multi-Touch, you can use simple gestures on its surface to do things such as swipe between web pages and scroll through documents.
Magic Trackpad 2
If you prefer using a trackpad, Magic Trackpad 2 gives you the full range of Multi-Touch gestures and introduces Force Touch to the desktop. Sensors underneath the trackpad surface detect subtle differences in the amount of pressure you apply, bringing more functionality to your fingertips and enabling a deeper connection to your content. This design, along with a low profile, makes it extremely comfortable to use.
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 with Retina 4K display
Height: 17.7 inches (45.0 cm)
Width: 20.8 inches (52.8 cm)
Stand depth: 6.9 inches (17.5 cm)
Weight: 12.3 pounds (5.60 kg)
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
macOS macOS is the operating system that powers everything you do on a Mac. macOS Mojave brings new features inspired by its most powerful users, but designed for everyone. So you can get more out of every click.
Accessibility features help people with disabilities get the most out of their new iMac. With built-in support for vision, hearing, physical and motor skills, and learning and literacy, you can create and do amazing things. Features include:
Siri and Dictation
Text to Speech
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