Apple Mac Pro “Twenty Four Core” 2.7 2019 Specs

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BTO/CTO – MacPro7,1 – A1991

About this Mac Pro

This device was launched with the Apple Pro XDR 32-inch Display. The 2013 Mac Pro came with a radical change in its design as the tower form had been ditched for a cylinder form. There is a reduction in the ports present like the total disappearance of FireWire Ports but the power of the 2019 Mac Pro did not diminish in any way.

With up to 8 primary and secondary displays possible with 5K Resolutions (5120×2880) possible for all displays, the storage was changed from the conventional HDD to a 256 GB SSD with upgrades on purchase to 512 GB or 1 TB available at extra cost. This is still a respected machine and will continue to be utilized by Apple fanatics far into the future.

Although the Mac Pro comes with 32 GB of RAM. The Operating System of the Mac Pro can also be upgraded from its pre-installed Mac OS X X 10.15 up to current MacOS X. This Mac Pro is also able to operate on Windows 10 (64-Bit). This Mac Pro has the following dimensions of 20.8×8.58 x17.7 inches and a weight of 39.7 lbs (18 kg).

2.7 GHZ 24-Core Xeon W

32 GB

256, 512 GB SSD

Plugged-in

Storage & Memory

The device was built with 256 GB SSD for its storage and was also customizable at purchase with 512 GB or 1 TB for additional cost.

Screen Size and Resolution

The Mac Pro had a primary display support for up to 6 displays and a resolution support of 6K.

OS & Processor

The Mac Pro has Mac OS X 10.15 pre-installed on it. This is powered by a single 3.5 GHz 8-Core Xeon W processor with 24.5 MB of level 3 “Smart Cache”. It has a AMD Radeon Pro 580X graphics processor with 8 GB of GDDR5 RAM.

Memory & Architecture

The device is run by 32 GB of 2666 MHz GDDR4 ECC RAM. This is centered on a 64-bit architecture which is the same as previous models.

Upgradability

Although the Mac Pro comes with 32 GB of RAM.
The Operating System of the Mac Pro can also be upgraded from its pre-installed Mac OS X X 10.15 up to current MacOS X. This Mac Pro is also able to operate on Windows 10 (64-Bit).
This Mac Pro has the following dimensions of 20.8×8.58 x17.7 inches and a weight of 39.7 lbs (18 kg).

Inclusive Features

The Mac Pro includes the following features and ports:

Standard AirPort Extreme 802.11ac
Bluetooth 5.0
2x 10Gigabit Ethernet ports
Two USB 3.0 ports
Four USC C ports
8 PCIe Expansion Slots
Supports up to 6 external screens

Introduced:June 3, 2019		Discontinued: N/A
Display Details		Memory
Display Support	Up to 6 displays	Level 1 Cache	Pending
Resolution	4K, 5K, 6K	Level 2/Level 3 Cache	Pending
Processor		RAM Type	DDR4 ECC
Processors	1 (24 Cores)	Min. RAM Speed	2666 MHz
Architecture	64-Bit	Standard RAM	32 GB
Speed	2.7 GHz	Maximum RAM	Pending
Type	24-Core Xeon W	RAM Slots	12
Processor Upgrade	Pending	Motherboard RAM	None
FPU	Integrated	Graphics
System Bus Speed	Pending	Video Card	AMD Radeon Pro 580X
Cache Bus Speed	2.7 GHz (Built-in)	VRAM Type	GDDR5 SDRAM
ROM/Firmware	EFI	Standard VRAM	8 GB
EFI Architecture	64-Bit	Maximum VRAM	64 GB
Storage		Inclusive Features and Ports
Standard Storage	256, 512 GB SSD	Standard Optical Drive	None
Storage Speed	2.6 – 2.7 GB/s	Standard Ethernet	10Gigabit (x2)
Storage Dimensions	Pending	Standard Modem	None
Storage Interface	Pending	Standard Air Port	802.11ac
Battery		Standard Bluetooth	5.0
Type	N/A	USB Port 3.0	2x 3.0, 4x Usb C
Battery Life	N/A	FireWire Ports	None
Description		Keyboard	Magic Keyboard w/ Numeric
Case Type	Tower	Expansion Slots	8 PCIe
Form Factor	Mac Pro (2019)	Sound In	1
Apple Order No	BTO/CTO	Microphone	1
Apple Subfamily	2019	Headphone	1
Apple Model Number	A1991 (EMC 3203)	Sound Out	1
Model ID	MacPro7,1	Power Adapter	1

Identifier reference: CTOMQGG2LL/A, A1991, EMC 3203, BTO/CTO MacPro7,1 A1991. 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 Mac Pro at a glance

Family: Mac Pro
Order Number: CTOMQGG2LL/A
Model Number: A1991
EMC: 3203
Model ID: BTO/CTO MacPro7,1 A1991
Year: 2022

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

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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.

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Common questions

Is CTOMQGG2LL/A the same as A1991?

Not exactly. CTOMQGG2LL/A usually points to a specific retail configuration, while A1991 identifies the broader Apple hardware family. Always check the EMC and model identifier too.

What Mac Pro is model A1991?

A1991 is the Apple A-number shown for this Mac Pro family. Use the order number, EMC, and model identifier on this page to narrow the exact configuration.

What does EMC 3203 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 Mac Pro 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 Mac Pro 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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Apple Mac Pro “Twenty Four Core” 2.7 2019 Specs

BTO/CTO – MacPro7,1 – A1991

About this Mac Pro

2.7 GHZ 24-Core Xeon W

32 GB

256, 512 GB SSD

Plugged-in

Storage & Memory

Screen Size and Resolution

OS & Processor

Memory & Architecture

Upgradability

Inclusive Features

Pending

DDR4 ECC

24-Core Xeon W

AMD Radeon Pro 580X

8 GB

64 GB

BTO/CTO

A1991 (EMC 3203)

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