Apple iMac “Intel i9″ 3.6 GHz 27” 2019 Specs

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Retina 5K, 27-Inch, 2019 – BTO/CTO – iMac19,1 – A2115 – 3194

About this iMac

The 2019 Apple iMac features a 5K Retina display with a rear aluminum tapered panel. The device is very similar to the previous iMac model in the lineup but features an updated processor as well as an updated graphics processor. Base models are specced out with a 1 TB hard drive and 8 GB of DDR4 SDRAM.

This iMac includes four USB 3.0 ports as well as two USB C (Thunderbolt 3) ports. As with all other 2019 iMac models this iMac also has Bluetooth, wifi & gigabit ethernet capabilities. This device does not have the T2 chip that is featured in some more recent models.

The iMac came with 8 GB of RAM it could be upgraded up to 128 GB of RAM. The Operating System of the iMac can also be upgraded from its pre-installed Mac OS X 10.14.4 up to the current MacOS X. This iMac is also able to run Windows 10 (64-Bit). This iMac has the following dimensions of 51.6 cm, 65.0 cm, 20.3 cm, and a weight of 21 lbs. (9.54 kg).

3.6 GHz Intel i9

8 GB

1, 2 TB ‘Fusion’ Drive

Plugged-in

Storage

The device was built with 1 TB or 2 TB “Fusion Drive” Serial ATA (6Gb/s) hard drive storage. The i9 2019 iMac 27 inch can be upgraded up to feature up to 8TB of SSD storage.

Screen Size and Resolution

This iMac features a 27 inch screen 5120×2880 LED-backlit 16:9 widescreen IPS display. This is a 5K Retina display with a brightness of 500 nits and a ”wide color” DCI-P3 gamut.

Processor& Graphics Processing Unit (GPU)

The iMac had the Mac OS X 10.14.4 (18E2034) operating system pre-installed on it. It was powered by a 14-nm “Coffee lake” Six Core 3.6 GHz Intel “Core i9” processor (I9-9900K) processor with six independent processor cores on a single chip. Its graphics processor was the AMD Radeon Pro 580X graphics processor with 8 GB of dedicated GDDR5 memory.

Memory & Architecture

The device was built with a 9 MB on-chip level 3 cache with 8 GB of 2666 MHz PC4-21300 DDR4. It’s designed was centered on a 64-Bit architecture.

Upgradability

The iMac came with 8 GB of RAM it could be upgraded up to 128 GB of RAM.
The Operating System of the iMac can also be upgraded from its pre-installed Mac OS X 10.11 (15A4310) up to current MacOS X. This iMac is also able to run Windows 10 (64-Bit).
This iMac had the following dimensions of 51.6 cm, 65.0 cm, 20.3 cm and a weight of 21 lbs. (9.54 kg).

Inclusive Features

A Power Adapter (100V-240V (50 Hz to 60 Hz, single phase))
802.11ac Wi-Fi
Gigabit Ethernet
Stereo Speakers
4 USB 3.0 ports
2 Thunderbolt 3 ports (USB-C)
FaceTime HD webcam
Bluetooth 4.2

Introduced: March 19, 2019		Discontinued: August 4, 2020
Screen Size and Resolution		Memory
Screen Size	27 inches Retina 5K	Level 1 Cache	32k/32k x8
Resolution	5120×2880	Level 2/Level 3 Cache	256k x 8/16 MB (L3)
Processor		RAM Type	PC4-21300 DDR4
Processors	1 (8 Cores)	Min. RAM Speed	2666 MHz
Architecture	64-Bit	Standard RAM	8 GB
Speed	3.6 GHz	Maximum RAM	128 GB
Type	Core i9 (I9-9900K)	RAM Slots	4
Processor Upgrade	LGA 1151	Motherboard RAM	None
FPU	Integrated	Graphics
System Bus Speed	8 GT/s (DMI3)	Video Card	Radeon Pro 575X/580X
Cache Bus Speed	3.6 GHz (Built-in)	VRAM Type	GDDR5
ROM/Firmware	EFI	Standard VRAM	4, 8 GB
EFI Architecture	64-Bit	Maximum VRAM	8 GB
Storage		Inclusive Features and Ports
Standard Storage	1, 2 TB ‘Fusion’ Drive	Standard Optical Drive	None
Storage Speed	N/A	Standard Ethernet	10/100/1000Base-T
Storage Dimensions	3.5″ (7 mm)	Standard Modem	None
Storage Interface	Serial ATA (6 Gb/s)	Standard AirPort	802.11ac
Battery		Standard Bluetooth	4.2
Type	N/A	USB Port 3.0	4
Battery Life	N/A	Thunderbolt Ports	2
Description		Keyboard	Magic Keyboard
Case Type	All-in-One	Inclusive Input	Magic Mouse 2
Form Factor	27″ iMac Tapered Edge	S-Video Output	None
Apple Order No	BTO/CTO	Microphone	1 (Built-in)
Apple Subfamily	Retina 5K, 27-Inch, 2019	Headphone	1
Apple Model Number	A2115 (EMC 3194)	Sound Out	1
Model ID	iMac19,1	Power	1

Identifier reference: A2115, EMC 3194, iMac19,1. 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
Model Number: A2115
EMC: 3194
Model ID: iMac19,1
Year: 2022

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Next steps

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Common questions

Is the order number the same as A2115?

Not exactly. The order number usually points to a specific retail configuration, while A2115 identifies the broader Apple hardware family. Always check the EMC and model identifier too.

What iMac is model A2115?

A2115 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 3194 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.

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