The iMac “Core i5” 3.0 21.5-Inch Aluminum (Mid-2015/Kaby Lake) features a 14-nm “Kaby Lake” 3.0 GHz Intel “Core i5” processor (5400) with four independent processor “cores” on a single chip, a 6 MB shared level 3 cache, 8 GB of 2400 MHz DDR4 SDRAM that is reportedly onboard — but actually can be upgraded later — a 1 TB (5400 RPM) hard drive, and a Radeon Pro 555 graphics processor with 2 GB of dedicated VRAM. It also has a built-in “FaceTime HD” webcam and stereo speakers. This model has a 21.5″ 4096×2304 LED-backlit 16:9 widescreen IPS DCI-P3 “Retina 4K” display (that runs “pixel doubled” to look like 2048×1152). The rear of the case is aluminum and is thicker in the middle and tapers to a razor thin 5 mm at the edges.

Display

• 21.5-inch (diagonal) LED-backlit display
• 1920‑by‑1080 resolution with support for millions of colors

Processor

• 2.3GHz 2.3GHz dual‑core Intel Core i5, Turbo Boost up to 3.6GHz

Memory

• 2.3GHz 8GB of 2133MHz DDR4 memory Configurable to 16GB

Storage

• 500GB Solid-State Drive

Graphics

• Intel Iris Plus Graphics 640

Video Support and Camera

• FaceTime HD camera
• Simultaneously supports full native resolution on the built-in display at millions of 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)

Audio

• 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-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
• Configurable with Magic Keyboard with Numeric Keypad
• Configurable with Magic Trackpad

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: 12.0 pounds (5.44 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
• Power cord

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. Learn more about latest operating system

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. Learn more about Accessibility Features include:

• Voice Control
• VoiceOver
• Zoom
• Increase Contrast
• Reduce Motion
• Siri and Dictation
• Switch Control
• Closed Captions
• Text to Speech

Built-in Apps

• 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