Apple iMac “Core i5″ 2.8 GHz 21.5” 2015 Specs

Shop iMac options Sell this iMac

iMac – MK442LL/A – iMac16,2 – A1418

About this iMac

The Apple iMac Intel Aluminum was released in October 2015. It had some uniqueness of its own from the other models such as the 802.11ac Wi-Fi which is backward compatible with the 802.11 a/b/g/n Wi-Fi. It had a 8 GB of onboard 1867 MHz LPDDR3 SDRAM. The “thick-at-the-middle-thin-at-the edges” design remained the same in this release of the computer just as late 2012, late 2013, and mid 2014 versions. This computer had all the needs of this generation of computing packed into its 45.0 cm, 52.8 cm, 17.5 cm and featured a light weight of 12.5 lbs. (5.68 kg) casing.

2.8 GHz Intel i5

8 GB

1 TBHard Drive

Plugged-in

Storage & Memory

The a1418 iMac device was built with 1 TB Serial ATA (6Gb/s) hard drive storage with a disk speed of 5400 RPM.

Screen Size and Resolution

The iMac Intel Aluminum version featured a 21.5 inch screen 1920×1080 LED-backlit 16:9 widescreen IPS display.

OS & Processor

The iMac had the Mac OS X 10.11 (15A2301) operating system pre-installed on it. It was powered by 14-nm “Broadwell” 2.8 GHz Intel “Core i5” processor (5575R) with four independent processor “cores” on a single chip. Its graphics processor was the “integrated” Intel Iris Pro 6200 graphics processor that shares the system memory.

Memory & Architecture

The device was built with a 4 MB on-chip level 3 cache with an 8 GB of onboard 1867 MHz LPDDR3 SDRAM. Its design was centered on a 64-Bit architecture.

Upgradability

The iMac came with 8 GB of RAM it could be upgraded up to 16 GB of RAM.The Operating System of the iMac can also be upgraded from its pre-installed Mac OS X 10.11 (15A2301) up to the current macOS X. This iMac was also able to run Windows 7 (64-Bit) and more recently Windows 10 (64-Bit).
This iMac had the following dimensions of 45.0 cm, 52.8 cm, 17.5 cm, and a weight of 12.5 lbs. (5.68 kg).

Inclusive Features

The iMac includes the following features and ports:

A Power Adapter (100V-240V (50 Hz to 60 Hz, single phase))
802.11ac Wi-Fi
Gigabit Ethernet
A Mini DisplayPort allowing dual and mirroring operations with resolutions of up to 2560×1600.
Stereo Speakers
Thunderbolt Ports
FaceTime HD webcam

Introduced: October 13, 2015		Discontinued: June 5, 2017
Screen Size and Resolution		Memory
Screen Size	21.5 inches TFT	Level 1 Cache	32k/32k
Resolution	1920×1080	Level 2/Level 3 Cache	256k x4, 4 MB (on chip)
Processor		RAM Type	LPDDR3 SDRAM
Processors	1 (4 Cores)	Min. RAM Speed	1867MHz
Architecture	64-Bit	Standard RAM	8 GB
Speed	2.8 GHz (Turbo Boost 3.3 GHz)	Maximum RAM	16 GB
Type	Core i5 (I5-5575R)	RAM Slots	None
Processor Upgrade	Soldered	Motherboard RAM	8 GB
FPU	Integrated	Graphics
System Bus Speed	5 GT/s	Video Card	Iris Pro 6200
Cache Bus Speed	2.8 GHz (Built-in)	VRAM Type	Integrated
ROM/Firmware	EFI	Standard VRAM	1.7 GB
EFI Architecture	64-Bit	Maximum VRAM	1.7 GB
Storage		Inclusive Features and Ports
Standard Storage	1 TB HDD	Standard Optical Drive	None
Storage Speed	5400 RPM	Standard Ethernet	10/100/1000Base-T
Storage Dimensions	2.5” (7 mm)	Standard Modem	None
Storage Interface	Serial ATA (6 Gb/s)	Standard AirPort	802.11ac
Battery		Standard Bluetooth	4.0
Type	N/A	USB Port 3.0	4
Battery Life	N/A	FireWire Ports	None
Description		Keyboard	Apple Wireless Keyboard
Case Type	All-in-One	Inclusive Input	Magic Mouse/Trackpad
Form Factor	21.5″ iMac Late 2012	S-Video Output	None
Apple Order No	MK442LL/A	Microphone	1 (Built-in)
Apple Subfamily	Late 2015	Headphone	1
Apple Model Number	A1418 (EMC 2889)	Sound Out	1
Model ID	iMac 16,2	Power	1

Identifier reference: MK442LL/A, A1418, EMC 2889, iMac16,2. Use these together because one Apple identifier can sometimes cover multiple configurations.

Last reviewed by Techable: August 19, 2025Identifiers checked: order number, A-number, EMC, and model identifier when available.

Model summary

This iMac at a glance

Family: iMac
Order Number: MK442LL/A
Model Number: A1418
EMC: 2889
Model ID: iMac16,2
Year: 2022

Use the order number, A-number, EMC, and model identifier together when comparing, buying, or selling this device.

Look up another Apple model

Search by A-number, EMC, order number, or model identifier.

Next steps

Use the spec table to confirm the exact device, then choose the right lookup, buy, or sell path.

Compare A1418 models Sell this iMac Shop iMac options

View all A1418 models View EMC 2889 matches View iMac16,2 matches Look up MK442LL/A Browse iMac specs by year

Common questions

Is MK442LL/A the same as A1418?

Not exactly. MK442LL/A usually points to a specific retail configuration, while A1418 identifies the broader Apple hardware family. Always check the EMC and model identifier too.

What iMac is model A1418?

A1418 is the Apple A-number shown for this iMac family. Use the order number, EMC, and model identifier on this page to narrow the exact configuration.

What does EMC 2889 mean?

The EMC number is another Apple hardware identifier. It helps separate closely related models that may share a similar name, year, or A-number.

Can the RAM or SSD be upgraded?

Check the spec table for the exact configuration. Many newer Apple Silicon Macs have memory and storage integrated into the board, so RAM and SSD upgrades are often not practical after purchase.

What macOS versions work with this model?

Use the model identifier, release year, and processor family from the spec table when checking macOS compatibility. Compatibility can change as Apple releases new macOS versions.

Is this iMac still worth buying used?

It can be, depending on price, battery health, memory, storage, and condition. Compare this exact order number and model identifier against similar Techable listings before buying.

How much is this iMac worth?

Value depends on RAM, storage, battery health, cosmetic condition, accessories, and market demand. Use the SellMac path on this page for a quote or use the identifiers here when comparing resale prices.

What should I search if this page is not the exact configuration?

Search the order number first when available, then compare the A-number, EMC, model identifier, year, chip, RAM, and storage. The same A-number can cover more than one configuration.

Handling multiple devices?

Techable and SellMac can help with business upgrades, school refreshes, and larger Apple lots.

Sell bulk tech SellMac bulk program

Welcome to Techable

At Techable, we believe technology should be accessible to everyone. Founded in 2016, we have built a transparent marketplace where users can confidently buy and sell tech. With the highest reviews in the industry, we are proud to lead the way in renewed technology.

Related Apple specs

Explore more iMac identifiers

Use these internal lookup paths to compare the family, year, chip, A-number, EMC, order number, and model identifier without relying on one identifier alone.

iMac specs hub 2022 iMac lookup View all A1418 models View EMC 2889 matches View iMac16,2 matches Look up MK442LL/A Browse iMac specs by year

Compare A1418 models

Apple A-numbers can cover more than one configuration. Compare the exact order number, EMC number, and model identifier before buying parts, shopping replacements, or quoting a device.

View all A1418 models

Sell this iMac

Confirm the exact model, RAM, storage, battery health, and condition before requesting a final SellMac quote.

Sell on SellMac

Shop replacements

Use this spec page as a reference when comparing tested refurbished options on Techable.

Shop on Techable

Use Techable to identify Apple model numbers, EMC numbers, order numbers, serials, and spec pages. Then check compatibility, shop tested devices, or sell through SellMac.

Apple iMac “Core i5″ 2.8 GHz 21.5” 2015 Specs

iMac – MK442LL/A – iMac16,2 – A1418

About this iMac

2.8 GHz Intel i5

8 GB

1 TBHard Drive

Plugged-in

Storage & Memory

Screen Size and Resolution

OS & Processor

Memory & Architecture

Upgradability

Inclusive Features

256k x4, 4 MB (on chip)

Core i5 (I5-5575R)

Iris Pro 6200

None

21.5″ iMac Late 2012

MK442LL/A

Late 2015

A1418 (EMC 2889)

Explore more iMac identifiers

Compare A1418 models

Sell this iMac

Shop replacements

Find the exact Apple device before you buy, sell, or upgrade.