iMac (Retina 4K, 21.5-inch, 2019) - Technical Specifications
Display
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)
Processor
3.6GHz
3.6GHz quad‑core Intel Core i3
Configurable to 3.2GHz 6-core Intel Core i7, Turbo Boost up to 4.6GHz
3.0GHz
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
Memory
3.6GHz
8GB of 2400MHz DDR4 memory
Configurable to 16GB or 32GB
3.0GHz
8GB of 2666MHz DDR4 memory
Configurable to 16GB or 32GB
Storage1
3.6GHz
256GB SSD
Configurable to 1TB Fusion Drive
3.0GHz
256GB SSD
Configurable to 1TB Fusion Drive
Graphics
3.6GHz
Radeon Pro 555X with 2GB of GDDR5 memory
3.0GHz
Radeon Pro 560X with 4GB of GDDR5 memory
Configurable to Radeon Pro Vega 20 with 4GB of HBM2 memory
Video Support and Camera
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)
Audio
Stereo speakers
Microphone
3.5 mm headphone jack
Connections and Expansion
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
Input
Magic Keyboard
Magic Mouse 2
Configurable with Magic Keyboard with Numeric Keypad
Configurable with Magic Trackpad 2
Wireless
Wi-Fi
802.11ac Wi-Fi wireless networking
IEEE 802.11a/b/g/n compatible
Bluetooth
Bluetooth 4.2 wireless technology
Size and Weight
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
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 90% noncondensing
Operating altitude: tested up to 16,400 feet (5000 meters)
In the Box
iMac with Retina 4K display
Magic Keyboard
Magic Mouse 2
Power cord
Lightning to USB Cable
Polishing cloth
Operating System
macOS
macOS is the most advanced desktop operating system in the world. macOS Big Sur introduces a bold new design and major updates to apps — taking macOS to a new level of power and beauty.
Accessibility
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:
Voice Control
VoiceOver
Zoom
Increase Contrast
Reduce Motion
Siri and Dictation
Switch Control
Closed Captions
Text to Speech
Built-in Apps3
Photos
iMovie
GarageBand
Pages
Numbers
Keynote
Siri
Safari
Mail
FaceTime
Messages
Maps
News
Stocks
Home
Voice Memos
Notes
Calendar
Contacts
Reminders
Photo Booth
Preview
Books
App Store
Time Machine
TV
Music
Podcasts
Find My
QuickTime Player
Configure to Order
Configure your iMac with these options.
Looking for an iMac you can mount on a wall or an adjustable arm? Choose an iMac with a Built-in VESA Mount Adapter
3.6GHz
Magic Trackpad 2
Magic Keyboard with Numeric Keypad
3.2GHz 6-core Intel Core i7 upgrade
16GB or 32GB memory upgrade
1TB Fusion Drive
3.0GHz
Magic Trackpad 2
Magic Keyboard with Numeric Keypad
3.2GHz 6-core Intel Core i7 upgrade
16GB or 32GB memory upgrade
1TB Fusion Drive
Radeon Pro Vega 20 with 4GB of HBM2 memory
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
Acoustic Performance
Declared noise emission values in accordance with ECMA-109
| Sound Power Level L W A,m (B) | Sound Pressure Level Operator Position L p A,m (dB) |
|---|---|---|
Idle | 2.0 (K V = 0.3) | 12 |
Wireless web | 2.0 (K V = 0.3) | 12 |
Hard drive seek | 2.1 (K V = 0.3) | 13 |
L W A,m is the mean A-weighted sound power level, rounded to the nearest 0.1 B.
L p A,m is the mean A-weighted sound pressure level measured at operator position (rounded to the nearest 1 dB).
1 B (bel) = 10 dB (decibel)
K v is the statistical adder for computing upper-limit of A-weighted sound power level.
The quantity, L W A,c (formerly called L W Ad) may be computed from the sum of L W A,m and K v .
The Wireless web test browses 25 popular websites.
Configuration tested: 3.0GHz 6-core Intel Core i5 processor, 8GB memory, 1TB Fusion drive, Radeon Pro 560X Graphics.
1GB = 1 billion bytes and 1TB = 1 trillion bytes; actual formatted capacity less.
Weight varies by configuration and manufacturing process.
iMovie, GarageBand, Pages, Numbers, and Keynote are available on the Mac App Store. Downloading apps requires an Apple ID and a device that is compatible with the OS version required for each app.
Data accurate as of product launch.
Every Apple product is free of PVC and phthalates with the exception of AC power cords in India, Thailand (for two-prong AC power cords), and South Korea, where we continue to seek government approval for our PVC and phthalates replacement.
Final assembly supplier sites for 21.5-inch iMac with Retina 4K display and 27‑inch iMac with Retina 5K display are third-party certified as Zero Waste by UL LLC (UL 2799 Standard).