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
3.5 mm 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
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: 12.0 pounds (5.44 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: 12.1 pounds (5.48 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 90% noncondensing
Operating altitude: tested up to 16,400 feet (5000 meters)
iMac or
iMac with Retina 4K display
Magic Keyboard
Magic Mouse 2
Power cord
Lightning to USB Cable
Polishing cloth
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
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 aluminum
- 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 fiber comes from responsibly managed forests
Recycling
Apple takes a holistic view of materials management and waste minimization. Learn more about how to recycle your Mac.
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.
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)
True Tone technology
3.1GHz
3.1GHz 6‑core 10th-generation Intel Core i5, Turbo Boost up to 4.5GHz
3.3GHz
3.3GHz 6‑core 10th-generation Intel Core i5, Turbo Boost up to 4.8GHz
3.8GHz
3.8GHz 8‑core 10th-generation Intel Core i7, Turbo Boost up to 5.0GHz
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 5300 with 4GB of GDDR6 memory
Radeon Pro 5300 with 4GB of GDDR6 memory
Radeon Pro 5500 XT with 8GB of GDDR6 memory
1080p FaceTime HD camera
Simultaneously supports full native resolution on the built-in display at 1 billion colors and:
One 6016-by-3384 (6K) external display at 60Hz with support for 1 billion colors, or
Two 6016-by-3384 (6K) external displays at 60Hz with support for 1 billion colors (requires Radeon Pro 5700 or Radeon Pro 5700 XT), or
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
Studio-quality three-mic array with high signal-to-noise ratio and directional beamforming
3.5 mm headphone jack
3.5 mm headphone jack
SDXC card slot (UHS-II)
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
Wi-Fi
802.11ac Wi-Fi wireless networking
IEEE 802.11a/b/g/n compatible
Bluetooth
Bluetooth 5.0 wireless technology
Height: 20.3 inches (51.6 cm)
Width: 25.6 inches (65.0 cm)
Stand depth: 8 inches (20.3 cm)
Weight: 19.7 pounds (8.92 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 90% noncondensing
Operating altitude: tested up to 16,400 feet (5000 meters)
iMac with Retina 5K display
Magic Keyboard
Magic Mouse 2
Power cord
Lightning to USB Cable
Polishing cloth
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
We take responsibility for the environmental footprint of our products throughout their life cycle. Learn more
The 27-inch iMac with Retina 5K display is designed with the following features to reduce its environmental impact:4
Made with better materials
- 100% recycled tin in the solder of the main logic board
- Enclosure made with recyclable, low-carbon aluminum
- 60% 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
- All final assembly suppliers are transitioning to 100% renewable energy for Apple production
Responsible packaging
- 100% of virgin wood fiber comes from responsibly managed forests
Recycling
Apple takes a holistic view of materials management and waste minimization. Learn more about how to recycle your Mac.
Learn more
Read the 27-inch iMac with Retina 5K Display Environmental Report for detailed information on its environmental performance.