Description
| Display | Display | Retina 4K display | |
| 21.5-inch (diagonal) LED-backlit display. | 21.5-inch (diagonal) Retina 4K display | ||
| 4096-by-2304 resolution with support for one billion colors | |||
| 1920‑by‑1080 resolution with support for millions of colors | 500 nits brightness | ||
| Wide color (P3) | |||
| Processor | 2.3GHz | 3.6GHz | 3.0GHz |
| 2.3GHz dual‑core Intel Core i5 (Turbo Boost up to 3.6GHz) | 3.6GHz quad‑core Intel Core i3 | 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) | Configurable to 3.2GHz 6-core Intel Core i7 (Turbo Boost up to 4.6GHz) | ||
| Memory | 8GB of 2133MHz DDR4 memory | 8GB of 2400MHz DDR4 memory | 8GB of 2666MHz DDR4 memory |
| Configurable to 16GB | Configurable to 16GB or 32GB | Configurable to 16GB or 32GB | |
| Storage | 1TB | 1TB | 1TB |
| 1TB (5400-rpm) hard drive | 1TB (5400-rpm) hard drive | 1TB Fusion Drive | |
| Configurable to 1TB Fusion Drive or 256GB SSD | Configurable to 1TB Fusion Drive or 256GB, 512GB, or 1TB SSD | Configurable to 256GB, 512GB, or 1TB SSD | |
| Graphics | 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 colors (21.5-inch) or 1 billion colors (21.5-inch 4K) and:
One 5120‑by‑2880 (5K) external display at 60Hz with support for 1 billion colors, or
Two 3840-by-2160 (4K UHD) external displays at 60Hz with support for 1 billion colors, or
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)
Stereo speakers
Microphone
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:
- 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
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: 5.66 kg (12.5 pounds)
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: 5.60 kg (12.3 pounds)
