Apple iMac Pro "18-Core" 2.3 27-Inch (5K, Late 2017) Specs
Identifiers: iMac Pro, Late 2017 - BTO/CTO - iMacPro1,1 - A1862 - 3144
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The iMac Pro "18-Core" 2.3 27-Inch (5K, Late 2017) technically is a "configure-to-order" configuration of the iMac Pro "8-Core" 3.2 27-Inch (5K, Late 2017) -- or starting August 4, 2020 -- the iMac Pro "10-Core" 3.0 27-Inch (5K, Late 2017), but also is documented as a separate model for reader convenience. Other than processors (and the corresponding cache), this model can be configured identically to its stock counterpart.
The iMac Pro "18-Core" 2.3 27-Inch (5K, Late 2017) features a 2.3 GHz Intel Xeon W processor (W-2191B) with eighteen independent processor "cores" on a single chip, 42.75 MB of cache, 32 GB of difficult to upgrade 2666 MHz DDR4 ECC SDRAM, a 1 TB SSD, and an Radeon Pro Vega 56 graphics processor with 8 GB of dedicated HBM2 video memory. It also has a built-in 1080p "FaceTime HD" webcam, stereo speakers, four microphones, and a 27" 5120x2880 LED-backlit 16:9 widescreen IPS DCI-P3 "Retina 5K" display, all packed in a thin, dark "Space Gray" housing.
Connectivity includes four USB 3.0 ports, four Thunderbolt 3 (USB-C) ports, Nbase-T Ethernet, 802.11ac Wi-Fi, and Bluetooth 4.2.
Compared to the "regular" 27-Inch iMac models that this iMac Pro complements, the iMac Pro not only has a dark "Space Gray" housing, but also has a much faster and more advanced architecture and graphics architecture as well as faster memory and storage and additional connectivity, but is much more difficult to upgrade, an unfortunate -- and unnecessary -- limitation for a "professional" system.
By default, the "Late 2017" iMac Pro models ship with a Magic Keyboard with Numeric Keypad and a Magic Mouse 2. For an extra US$50, you can substitute the Magic Mouse 2 for a color matched Magic Trackpad 2 (which provides multi-touch input and Force Touch support). Alternately, you can equip this iMac Pro with a color matched Magic Mouse 2 and a Magic Trackpad 2 for an additional US$149.
Also see:
- What are all the differences between the "Late 2017" iMac Pro models? (In-Depth)
- What are all of the differences between the 27-Inch "Mid-2017" iMac models and the "Late 2017" iMac Pro models? (In-Depth)
- What are the "pros and cons" of the "Late 2017" iMac Pro? (Quick Read)
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- Tech Specs
- Ports
- Global Original Prices
- Popular Q&As
Click on a category for related details. The most commonly needed info is "open" by default, but all info is important. Asterisks (*) reference data in details fields.
| Introduction Date: |
December 14, 2017* |
Discontinued Date: |
March 5, 2021 |
| Details: |
The "Introduction Date" refers to the date a model was introduced via press release. The "Discontinued Date" refers to the date a model either was replaced by a subsequent system or production otherwise ended.
*This iMac Pro model was introduced as a promised product with limited specifics on June 5, 2017. More concrete details were released and it first was available for order on December 14, 2017. This particular custom configuration of the iMac Pro had its price cut significantly on August 4, 2020.
Also see: All Macs introduced in 2017. |
| Processors: |
1 (18 Cores) |
Architecture: |
64-Bit |
| Geekbench 2 (32): |
41222 |
Geekbench 2 (64): |
47842 |
| Details: |
Geekbench 2 benchmarks are in 32-bit and 64-bit modes, respectively. These numbers reflect an average of user provided 32-bit and 64-bit results as submitted to the Geekbench website. Higher numbers are better.
You also might be interested in reviewing all 32-bit and 64-bit Geekbench 2 user submissions for Macs with the iMacPro1,1 Model Identifier, which may include multiple models.
To dynamically compare Geekbench 2 results from different Macs side-by-side, see EveryMac.com's Ultimate Mac Comparison. |
| Geekbench 3 (32): |
4086 |
Geekbench 3 (32): |
52571 |
| Details: |
These Geekbench 3 benchmarks are in 32-bit mode and are for a single processor core and all processor cores, respectively. Both numbers reflect an average of user provided results as submitted to the Geekbench website. Higher numbers are better.
You also might be interested in reviewing all 32-bit single core and multicore Geekbench 3 user submissions for Macs with the iMacPro1,1 Model Identifier, which may include multiple models.
To dynamically compare 32-bit Geekbench 3 results from different Macs side-by-side, see EveryMac.com's Ultimate Mac Comparison. |
| Geekbench 3 (64): |
4658 |
Geekbench 3 (64): |
60049 |
| Details: |
These Geekbench 3 benchmarks are in 64-bit mode and are for a single processor core and all processor cores, respectively. Both numbers reflect an average of user provided results as submitted to the Geekbench website. Higher numbers are better.
You also might be interested in reviewing all 64-bit single core and multicore Geekbench 3 user submissions for Macs with the iMacPro1,1 Model Identifier, which may include multiple models.
To dynamically compare 64-bit Geekbench 3 results from different Macs side-by-side, see EveryMac.com's Ultimate Mac Comparison. |
| Geekbench 4 (SC): |
5156 |
Geekbench 4 (MC): |
47221 |
| Details: |
These Geekbench 4 benchmarks are are for a single processor core and all processor cores, respectively. All Geekbench 4 benchmarks are 64-bit. Both numbers reflect an average of user provided results as submitted to the Geekbench website. Higher numbers are better.
You also might be interested in reviewing all single core and multicore Geekbench 4 user submissions for Macs with the iMacPro1,1 Model Identifier, which may include multiple models.
To dynamically compare Geekbench 4 results from different Macs side-by-side, see EveryMac.com's Ultimate Mac Comparison. |
| Geekbench 5 (SC): |
1097 |
Geekbench 5 (MC): |
13481 |
| Details: |
These Geekbench 5 benchmarks are are for a single processor core and all processor cores, respectively. All Geekbench 5 benchmarks for the Mac are 64-bit. Both numbers reflect an average of user provided results as submitted to the Geekbench website. Higher numbers are better.
You also might be interested in reviewing all single core and multicore Geekbench 5 user submissions for Macs with the iMacPro1,1 Model Identifier, which may include multiple models.
To dynamically compare Geekbench 5 results from different Macs side-by-side, see EveryMac.com's Ultimate Mac Comparison. |
| Processor Speed: |
2.3 GHz |
Processor Type: |
18-Core Xeon W-2191B* |
| Details: |
*Apple formally reports that this model is powered by an "18-Core 2.3 GHz Intel Xeon W" processor with a Turbo Boost up to 4.3 GHz and 42.75 MB of cache. This system self-reports that it is an Intel Xeon W-2191B (likely related to the Intel Xeon W-2195) with 18 processor cores (36 threads), a base frequency of 2.3 GHz and a maximum Turbo Boost of 4.3 GHz with 18 MB of level 2 cache and 24.75 MB of level 3 cache (42.75 MB total).
This iMac Pro also has a secondary "T2" processor for "enhanced security and integration," which includes secure boot and encrypted storage capabilities as well as enhanced image processing.
Also see: How fast are the "Late 2017" iMac Pro models compared to one another? How fast are they compared to the "Mid-2017" 27-Inch iMac 5K models and the "Cylinder" Mac Pro? |
| Turbo Boost: |
4.3 GHz |
Custom Speeds: |
N/A |
| Processor Upgrade: |
LGA 2066* |
FPU: |
Integrated |
| Details: |
*Officially, Apple provides no information about whether or not the processor in this model can be upgraded and it is difficult to access. However, Intel reports that this processor traditionally is mounted on an FCLGA2066 socket and has a 140 W TDP. As first confirmed by site sponsor OWC, this model is mounted on a FCLGA2066 socket, as expected.
Also see: How do you upgrade the processor in the iMac Pro models? How is it mounted? Is it even possible to upgrade the processor? |
| System Bus Speed: |
QPI* |
Cache Bus Speed: |
2.5 GHz (Built-in) |
| Details: |
*This iMac Pro has a "QuickPath Interconnect" (QPI) system described as a "point-to-point interconnect between the CPU and the integrated memory controller." |
| ROM/Firmware Type: |
EFI |
EFI Architecture: |
64-Bit |
| L1 Cache: |
32k/32k x14 |
L2/L3 Cache: |
18 MB, 24.75 MB* |
| Details: |
*This processor has 18 MB of level 2 cache and 24.75 MB of level 3 cache for an Apple reported total of "42.75 MB" of cache. |
| RAM Type: |
DDR4 ECC SDRAM* |
Min. RAM Speed: |
2666 MHz |
| Details: |
Uses "2666 MHz DDR4 ECC memory" (PC4-21300) modules.
Also see: How do you upgrade the RAM in the "Late 2017" iMac Pro models? Is it even possible? What type of RAM do they use? How much RAM does each model actually support? |
| Standard RAM: |
32 GB |
Maximum RAM: |
512 GB* |
| Details: |
*Apple originally reported that this iMac Pro supports "up to 128 GB of quad-channel 2666 MHz DDR4 ECC memory," but increased this to 256 GB on March 19, 2019. By default, it ships with four 8 GB memory modules. On December 20, 2019, site sponsor OWC determined that this iMac Pro actually can support up to 512 GB of RAM.
At the time of purchase, Apple also originally offered to configure this model with 64 GB or 128 GB of RAM for an extra US$800 or US$2400, respectively. On March 19, 2019, Apple dropped the price of the 64 GB and 128 GB upgrade options to US$400 and US$2000, respectively, and added a new 256 GB upgrade option for US$5200.
In the US (and many other countries), site sponsor Other World Computing sells memory -- as well as other upgrades -- for this iMac Pro.
In the UK, site sponsor Flexx sells memory and other upgrades for this iMac Pro.
In Germany, site sponsor CompuRAM sells memory and other upgrades for this iMac Pro.
In Australia, site sponsor Upgradeable sells memory and other upgrades for this iMac Pro.
Also see: Actual Max RAM of All G3 & Later Macs. |
| Motherboard RAM: |
None |
RAM Slots: |
4* |
| Details: |
*Officially, Apple reports that the RAM is "not user accessible" and to "consider upgrading it at the time of [system] purchase" at substantial additional cost. However, it has four RAM slots, they're just needlessly complicated to access, an unfortunate design for a "professional" system. |
| Video Card: |
Radeon Pro Vega 56 |
VRAM Type: |
Dedicated (HBM2) |
| Details: |
By default, this model has an AMD Radeon Pro Vega 56 graphics processor with 8 GB of dedicated HBM2 video memory. For an extra US$600 (US$550 after March 19, 2019), it also is possible to configure this model with an AMD Radeon Pro Vega 64 with 16 GB of dedicated HBM2 video memory. On March 19, 2019, Apple also added the option of a Radeon Pro Vega 64X with 16 GB of dedicated HMB2 memory for US$700.
What are the differences between the AMD Radeon Pro Vega processors available for the iMac Pro? Which is right for me? Is it possible to upgrade after initial system purchase? |
| Standard VRAM: |
8 GB* |
Maximum VRAM: |
16 GB* |
| Details: |
*By default, this iMac Pro is configured with an AMD Radeon Pro Vega 56 graphics processor with 8 GB of dedicated HBM2 video memory. It also can be configured with an AMD Radeon Pro Vega 64 with 16 GB of dedicated HBM2 video memory at additional cost. As first determined by site sponsor OWC, the video processor is soldered in place and cannot be upgraded after the initial system purchase. |
| Built-in Display: |
27" 16:9 Widescreen |
Native Resolution: |
5120x2880 |
| Details: |
This model has a 27" LED-backlit 16:9 widescreen TFT active matrix "Retina 5K" display with IPS technology, a native resolution of 5120x2880, a "wide color" DCI-P3 gamut, and brightness of 500 nits.
In the UK, site sponsor ALB Repair offers component-level logic board repair, display repair, and other repair services for this iMac Pro. No fix, no fee!
In Spain, site sponsor iRepairs provides affordable repair and data recovery services. In-person and by mail repair services include the display, graphics card, motherboard, power supply, and more for this iMac Pro.
In Hong Kong, site sponsor iCertified provides well-reviewed repair services for the display, logic board, water damage, and more, all with a 180-day warranty; free diagnostics and estimates; and optional pickup and delivery for this iMac Pro. |
| 2nd Display Support: |
Dual/Mirroring* |
2nd Max. Resolution: |
5120x2880 x2 |
| Details: |
*This model can simultaneously support the internal display at full native resolution and up to two 5120x2880 (5K) external displays at 60 Hz with support for one billion colors; up to four 3840x2160 (4K UHD) external displays at 60 Hz with support for one billion colors; or four 4096x2304 (4K) external displays at 60 Hz with support for million of colors. It supports both extended desktop (second workspace) and video mirroring (internal display duplicated on the external display) modes. |
| Standard Storage: |
1 TB SSD |
Std. Storage Speed: |
N/A |
| Details: |
This model has a 1 TB SSD. At the time of purchase, it also originally could be configured with a 2 TB SSD or a 4 TB SSD for US$800 or US$2800. On March 19, 2019, Apple cut these prices to US$600 and US$2400, respectively. On July 9, 2019, Apple again cut these prices to US$400 and US$1200, respectively. On August 4, 2020, Apple cut the price of the 4 TB SSD once more to US$1000.
Also see: How do you upgrade the storage in the "Late 2017" iMac Pro models? What type of storage do they support? Is it even possible to upgrade these models?
Also see: SSD Compatibility Guide for All G3 & Later Macs. |
| Storage Dimensions: |
Proprietary* |
Storage Interface: |
Proprietary* |
| Details: |
*Apple reports that the storage in this iMac Pro is NVMe-based and it is "not user accessible," a rather disappointing omission for a "professional" system. However, as first discovered by site sponsor OWC the SSD is installed as two small modules, 512 GB each by default, (EMC 3197, 656-0061A). iFixit further elaborated that these are "raw flash modules" that "only have an interface buffer -- the PCIe/NVMe controller lies elsewhere."
Also see: What external storage options are available for the iMac Pro? Which is the fastest? |
| Standard Optical: |
None* |
Standard Disk: |
None |
| Details: |
*This iMac does not have an internal optical drive. Site sponsor Adorama offers the external Apple USB SuperDrive for US$79. It writes DVD+R DL and DVD-R DL at 4X, DVD-R and DVD+R at 8X, DVD-RW at 6X, DVD+RW at 8X, reads DVD at 8X, writes CD-R at 24X, writes CD-RW at 16X, and reads CD at 24X.
Site sponsor Other World Computing also has a variety of compact external optical drive options that may be of interest, including some with Blu-ray capability.
Also see: What are the full capabilities of the external SuperDrive? Can it be used with other Macs? |
| Standard Modem: |
None |
Standard Ethernet: |
Nbase-T |
| Details: |
This model is equipped with Nbase-T Ethernet with support for "1 Gb, 2.5 Gb, 5 Gb, and 10 Gb Ethernet using RJ-45 connector." |
| Standard AirPort: |
802.11ac* |
Standard Bluetooth: |
4.2* |
| Details: |
*802.11ac Wi-Fi (802.11a/b/g/n backwards compatible) and Bluetooth 4.2 standard. On August 4, 2020, Apple revised their information to report that this model supports Bluetooth 5.0. |
| USB Ports: |
4 (3.0) |
Firewire Ports: |
None |
| Details: |
The iMac Pro models are equipped with four USB 3 ports (USB-A connector). They also have four Thunderbolt 3 ports (USB-C connector).
Also see: What is the best USB hub for the iMac Pro? |
| Expansion Slots: |
SDXC SD (UHS-II)* |
Expansion Bays: |
None |
| Details: |
*Apple reports that the SDXC SD card slot has support for UHS-II.
In the US (and many other countries), site sponsor Other World Computing sells a wide variety of external expansion options and hand-picked accessories like external storage, stands, keyboards, cables, adapters, speakers, and more for this iMac. |
| Incl. Keyboard: |
Magic Keyboard* |
Incl. Input: |
Magic Mouse 2* |
| Details: |
*This model ships with dark "Space Gray" colored input devices. These input devices only are available with the purchase of this system and originally could not be purchased independently after the initial purchase of the system. By default, it includes a Magic Keyboard with Numeric Keypad and a Magic Mouse 2. For an extra US$50, you can substitute the Magic Mouse 2 for a color matched Magic Trackpad 2 (which provides multi-touch input and Force Touch support). Alternately, you can equip this iMac Pro with a color matched Magic Mouse 2 and a Magic Trackpad 2 for an additional US$149. |
| Case Type: |
All-in-One |
Form Factor: |
27" iMac Pro |
| Details: |
The 27-Inch "Late 2017" iMac Pro looks similar to earlier 27-Inch "Tapered Edge" iMac models, but is a dark "Space Gray" color and that sadly, is even more difficult to upgrade. The internals are completely different, too. All iMac Pro models have a glass front laminated directly to the LCD and an aluminum back that is thicker in the middle and tapers to a razor thin 5 mm edge. The entire system sits upon an aluminum "foot" that is 8 inches (20.3 cm) deep. |
| Apple Order No: |
BTO/CTO |
Apple Subfamily: |
iMac Pro, Late 2017 |
| Apple Model No: |
A1862 (EMC 3144) |
Model ID: |
iMacPro1,1 |
| Details: |
Please note that these identifiers refer to more than one model.
Also see: All Macs with the A1862 Model Number, the 3144 EMC Number, and the iMacPro1,1 Model Identifier.
For more about these identifiers and how to locate them on each Mac, please refer to EveryMac.com's Mac Identification section. |
| Battery Type: |
N/A |
Battery Life: |
N/A |
| Pre-Installed MacOS: |
X 10.13.2 (17C2111) |
Maximum MacOS: |
Current* |
| Details: |
This system fully supports the final version of macOS High Sierra (10.13), macOS Mojave (10.14), macOS Catalina (10.15), and macOS Big Sur (macOS 11). It additionally supports the final version of macOS Monterey (macOS 12), but it does not support the minor Spatial Audio, Portrait Mode, 3D Landmarks, and Interactive Globe features. When paired with a compatible iPad, it supports the Sidecar feature.
This model also is fully compatible with macOS Ventura (macOS 13) with the exception of the minor Live Captions in FaceTime, Emoji Dictation, and Reference Mode with Sidecar features.
Likewise, this model is fully compatible with macOS Sonoma (macOS 14) with the exception of the minor Presenter Overlay, React with your Hands using the built-in camera, Game Mode, high-performance mode in the Screen Sharing app, and quicker Siri launch capability.
Finally, this model is compatible with the current version of the macOS -- macOS Sequoia (macOS 15) -- with the exception of the Apple Intelligence (AI) and Live audio transcription features.
Also see: Which Macs are compatible with macOS Sequoia (macOS 15)? What are the system requirements? What are the major new features? Do all features work with all supported Macs? |
| Minimum Windows: |
10 (64-Bit)* |
Maximum Windows: |
10 (64-Bit)* |
| Details: |
*The pre-installed version of Apple's Boot Camp 6 supports the 64-bit version of Windows 10. Earlier versions of Windows are not supported. |
| MacOS 9 Support: |
None |
Windows Support: |
Boot/Virtualization |
| Details: |
Also see: Are there any third-party programs to run Mac OS 9/Classic applications on Intel Macs?
For more on running Windows on Intel Macs, please refer to the exhaustive Windows on Mac Q&A. |
| Dimensions: |
20.3 x 25.6 x 8 |
Avg. Weight: |
21.5 lbs. (9.7 kg) |
| Details: |
In inches - height by width by depth, (51.6 cm, 65.0 cm, 20.3 cm). |
| Original Price (US): |
US$7399 |
Est. Current Retail: |
US$2700-US$3300 |
| Details: |
*Apple cut the price of this custom configuration to US$6599 on August 4, 2020.
Please note that on average the estimated current retail pricing of used systems is updated twice a year (please refer to the date on the bottom of the page for the date last updated).
Photo Credit: Apple Computer. |
Click on a category for additional details. The most commonly needed info is "open" by default, but all info is important. The icons correspond with the icons for each port on the computer.
| Video (Monitor): |
 4 (Thunderbolt 3/USB-C) |
Floppy (Ext.): |
 None |
| Details: |
This model has four Thunderbolt 3 ports. These four ports support DisplayPort 1.2, Thunderbolt (up to 40 Gbps), and USB 3.1 Generation 2 (up to 10 Gbps). Adapters also are available to use Thunderbolt 2, HDMI, DVI, and VGA.
In the US (and many other countries), site sponsor Other World Computing sells Thunderbolt docks and external drives compatible with this Mac and just about all others.
What is Thunderbolt 3? What is the difference between USB-C and Thunderbolt 3? What Thunderbolt 3 adapters and docks are available? |
| ADB: |
 None |
SCSI: |
 None |
| Serial (Standard): |
 None |
Serial (Geoport): |
 None |
| USB: |
 4 (3.0) |
Firewire: |
 None |
| Details: |
The iMac Pro models are equipped with four USB 3 ports (USB-A connector). They also have four Thunderbolt 3 ports (USB-C connector).
Also see: What is the best USB hub for the iMac Pro? |
| Modem: |
None |
Ethernet: |
 1 (RJ-45) |
| Details: |
Nbase-T Ethernet, 802.11ac Wi-Fi (802.11a/b/g/n backwards compatible) and Bluetooth 4.2 standard. |
| S-Video Input: |
 None |
S-Video Output: |
 None |
| Microphone: |
 4 (Built-in) |
Sound In: |
 N/A |
| Details: |
The iMac Pro has four built-in microphones. |
| Sound Out: |
 1 |
Headphone: |
 1 |
| Details: |
Single 3.5 mm headphone jack. |
| Security (Lock): |
 1 |
Joystick (PC): |
 None |
| Power: |
 1 |
Power Adapter: |
 None |
| Details: |
100V-240V (50 Hz to 60 Hz, single phase), Apple does not specify maximum wattage, but it has a 500 watt power supply. |
Global original prices for the iMac Pro "18-Core" 2.3 27-Inch (5K, Late 2017) in 34 different countries and territories follow; organized alphabetically by region.
For global original prices for Intel Macs in one particular country on a single page, please refer to EveryMac.com's Global Original Prices section.
Original Prices - North & South America
| Canada: |
C$9179 |
Brazil: |
R$54.799 |
| Mexico: |
MXN $176,999 |
United States: |
US$7399 |
Original Prices - Europe
| Austria: |
€8379 |
Belgium: |
€8379 |
| Denmark: |
DKK 63,639 |
Finland: |
€8479 |
| France: |
€8379 |
Germany: |
€8379 |
| Ireland: |
€8479 |
Italy: |
€8479 |
| Luxembourg: |
€8102,02 |
Netherlands: |
€8379 |
| Norway: |
NOK 82.390 |
Portugal: |
€8479 |
| Spain: |
€8379 |
Sweden: |
SEK 83.395 |
| Switzerland: |
CHF 8'439 |
United Kingdom: |
£7059 |
Original Prices - Asia
| China: |
RMB 57,728 |
Hong Kong: |
HK$57,608 |
| India: |
N/A |
Indonesia: |
N/A |
| Japan: |
¥822,800 |
Korea: |
KRW 9,240,000 |
| Malaysia: |
RM 32,039 |
The Philippines: |
PHP 415,990 |
| Singapore: |
S$10,548 |
Taiwan: |
NT$238,140 |
| Thailand: |
THB 268,900 |
Vietnam: |
N/A |
Original Prices - Australia & New Zealand
| Australia: |
A$11,139 |
New Zealand: |
NZ$12,579 |
If you have additional original prices for this model, please get in touch. Thank you.
Ten of the most popular Q&As about the iMac Pro models follow.
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