iMac Retina 4K 21.5-inch Late 2015 Datasheet

Source: – iMac 21.5-inch

The Apple iMac Retina 4K 21.5-inch Late 2015 is a personal computer designed, manufactured, and sold by Apple from 2015 to 2017 as part of the iMac series. The computer was introduced on October 13, 2015, and its price started at $1,499.

The new iMac features a 3.1 GHz Intel Core i5 or 3.3 GHz Intel Core i7 processor, 8 GB or 16 GB of RAM, 21.5-inch high-resolution Retina 4K glossy LED-backlit IPS LCD Display, 1 TB hard drive, Ambient Light Sensor, FaceTime HD camera, two Thunderbolt 2 ports USB 3.0 ports, an SDXD card slot, and 1.5 GB Intel Iris Pro 6200 graphics in the base model.

This iMac has been discontinued on June 5, 2017. Today iMac Retina 4K 21.5-inch Late 2015 is 8 years old!

iMac Retina 4K 21.5-inch Late 2015 Details

Introduced October 13, 2015 – 8 years ago
Discontinued June 5, 2017 – 6 years ago
Last Software Update May 13, 2024 – 6 days ago
Time on the Market 19 months (1 year)
Time of Support 103 months (8 years)
Model Identifier iMac16,2
Model Number A1418
EMC 2833
Order Number MK452LL/A
Original Price $1,499
Colors Silver Aluminum
Weight 12.5 Ibs.
5.669 KG
Dimensions 17.7” H x 20.8” W x 6.9” D
44.95 cm H x 52.83 cm W x 17.52 cm D

iMac Retina 21.5-inch Tech Specs


Processor Intel Core i5 5675R “Broadwell” (3.1 GHz)
Intel Core i7 5775R “Broadwell” (3.3 GHz)
Processor Speed 3.1 GHz
3.3 GHz
Maximum Processor Speed Up to 3.6 GHz (Core i5)
Up to 3.8 GHz (Core i7)
Architecture 64-bit
Number of Cores 4
System Bus Intel Direct Media Interface (DMI) at 5 GT/s
Cache 4 MB L3 (Core i5)
6 MB L3 (Core i7)

Storage & Media

Storage 1 TB HDD
1 TB Fusion Drive
2 TB Fusion Drive
256 GB SSD
512 GB SSD
Media None


Built-in Memory 8 GB integrated PC3-14900 204-pin LPDDR3 1867 MHz
16 GB integrated PC3-14900 204-pin LPDDR3 1867 MHz
Maximum Memory 16 GB
Memory Slots None
Interleaving Support Yes


Built-in Display 21.5″ high-resolution Retina 4K IPS LED-backlit LCD glossy widescreen Display
Display Glass Standard
Color Gamut Wide color gamut P3
Brightness Unknown
Pixel Density 219 ppi
Resolutions 4096 x 2304


Graphics Card Intel Iris Pro Graphics 6200
Graphics Memory Up to 1.5 GB shared from main memory
Display Connection 2 – Thunderbolt 2
Display Support Support for up to two Thunderbolt displays
Display Modes Dual display extended, video mirroring, and AirPlay Mirroring
External Resolution Up to 4096 x 2304 pixels
Camera FaceTime HD


Expansion Slots 1 – Secure Digital (SDXC)
Hard Drive Interface 1 – 6 Gbps Serial ATA (SATA)
1 – 8.0 GT/s PCIe x4


Ethernet 10/100/1000BASE-T (RJ-45)
Modem None
Wi-Fi 802.11ac
Bluetooth Bluetooth 4.0
USB 4 – Up to 5 Gbps
Infrared None
Thunderbolt 2 – Thunderbolt 2 (Up to 20 Gbps)
Audio In 1 – 3.5-mm analog/optical combo jack
2 – Microphones
Audio Out 1 – 3.5-mm analog/optical combo jack
2 – Built-in speakers
Display 2 – Thunderbolt 2

Keyboard and Mouse

Peripherals Magic Keyboard
Magic Mouse 2 or Magic Trackpad 2


Original OS OS X 10.11
Later OS OS X 10.11.1
Maximum OS macOS 12.7.5
Firmware Intel Extensible Firmware Interface
AirDrop Supported
Handoff Supported
Unlock with Apple Watch Supported with macOS Sierra (Apple Watch (1st generation), Apple Watch Series 1, and Apple Watch Series 2)
macOS High Sierra or later (Apple Watch Series 3 or later)
Bundled Software OS X 10.11


Backup Battery 3 V CR2032 Lithium
Maximum Continuous Power 205 W
Line Voltage 100-240 V AC

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Disclaimer: The data presented in this article is under continuous development and has been manually collected from various sources based on their availability. The author of this article may revise this dataset as additional research is conducted and reviewed. Please note that the information is provided “as is” and “as available” without express or implied warranties. The author cannot be held responsible for any omissions, inaccuracies, or errors in the published information. Any warranties relating to this information are hereby disclaimed.

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