27-inch (diagonal) Retina 5K display
5120‑by‑2880 resolution with support for 1 billion colours
500 nits brightness
Wide colour (P3)
3.4GHz quad‑core Intel Core i5 (Turbo Boost up to 3.8GHz)
8GB (two 4GB) of 2400MHz DDR4 memory; four SO-DIMM slots, user-accessible
Configurable to 16GB or 32GB
1TB Fusion Drive
Radeon Pro 570 with 4GB of VRAM
Video Support and Camera
FaceTime HD camera
Simultaneously supports full native resolution on the built-in display at 1 billion colours and:
One 5120‑by‑2880 (5K) external display at 60Hz with support for 1 billion colours or
Two 3840-by-2160 (4K UHD) external displays at 60Hz with support for 1 billion colours or
Two 4096‑by‑2304 (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)
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 40 Gbps)
USB 3.1 Gen 2 (up to 10 Gbps)
Thunderbolt 2, HDMI, DVI and VGA 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 a remarkably compact edge-to-edge design that wastes no surface space. It has a stable scissor mechanism, optimised key travel and a low profile, providing control and comfort. And it pairs immediately with your iMac, straight 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. The new Magic Keyboard with Numeric Keypad includes document navigation controls — Page Up, Page Down, Home and End — and full-sized 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.
802.11ac Wi-Fi wireless networking
IEEE 802.11a/b/g/n compatible
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)
macOS High Sierra
macOS is the operating system that powers everything you do on a Mac. macOS High Sierra brings new forward-looking technologies and enhanced features to your Mac. It’s macOS at its highest level yet.
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.