iMac - Technical Specifications
Display
21.5-inch (diagonal) LED-backlit display
1920‑by‑1080 resolution with support for millions of colors
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)
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)
8GB of 2133MHz DDR4 memory
8GB of 2400MHz DDR4 memory
8GB of 2666MHz DDR4 memory
Intel Iris Plus Graphics 640
Radeon Pro 555X with 2GB of GDDR5 memory
Radeon Pro 560X with 4GB of GDDR5 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
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
Magic Keyboard
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
21.5-inch iMac
Height: 17.7 inches (45.0 cm)
Width: 20.8 inches (52.8 cm)
Stand depth: 6.9 inches (17.5 cm)
Weight: 12.5 pounds (5.66 kg)2
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)2
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
21.5‑inch iMac or
21.5‑inch iMac with Retina 4K display
Magic Keyboard
Magic Mouse 2
Power cord
Lightning to USB Cable
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.
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
- Dictation
- Switch Control
- Closed Captions
- Text to Speech
iMac and the Environment
Apple takes a complete product life cycle approach to determining our environmental impact. Learn more
iMac is designed with the following features to reduce its environmental impact:
Apple and the Environment
Read our Product Environmental Reports for detailed information on the environmental performance of every Apple product.
Recycling
Apple takes a holistic view of materials management and waste minimization. Learn more about how to recycle your Mac.
Retina 5K display
27-inch (diagonal) Retina 5K display
5120‑by‑2880 resolution with support for one billion colors
500 nits brightness
Wide color (P3)
3.0GHz
3.0GHz 6‑core Intel Core i5 (Turbo Boost up to 4.1GHz)
3.1GHz
3.1GHz 6‑core Intel Core i5 (Turbo Boost up to 4.3GHz)
3.7GHz
3.7GHz 6‑core Intel Core i5 (Turbo Boost up to 4.6GHz)
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
Radeon Pro 570X with 4GB of GDDR5 memory
Radeon Pro 575X with 4GB of GDDR5 memory
Radeon Pro 580X with 8GB of GDDR5 memory
FaceTime HD camera
Simultaneously supports full native resolution on the built-in display at 1 billion colors 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
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
Magic Keyboard
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
Height: 20.3 inches (51.6 cm)
Width: 25.6 inches (65.0 cm)
Stand depth: 8 inches (20.3 cm)
Weight: 20.8 pounds (9.42 kg)2
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
iMac with Retina 5K display
Magic Keyboard
Magic Mouse 2
Power cord
Lightning to USB Cable
macOS
macOS is the operating system that powers everything you do on a Mac. macOS Catalina 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, mobility, and learning, you can create and do amazing things.
Features include:
- VoiceOver
- Zoom
- Increase Contrast
- Reduce Motion
- Dictation
- Switch Control
- Closed Captions
- Text to Speech
iMac and the Environment
Apple takes a complete product life cycle approach to determining our environmental impact. Learn more
iMac is designed with the following features to reduce its environmental impact:
Apple and the Environment
Read our Product Environmental Reports for detailed information on the environmental performance of every Apple product.
Recycling
Apple takes a holistic view of materials management and waste minimization. Learn more about how to recycle your Mac.