Upgrading an iMac Pro to 256GB of RAM Only Possible at Time of Purchase [Updated]

Update: Despite what Apple's internal document stated, OWC has released an aftermarket 256GB memory upgrade kit for the iMac Pro for $2,499.



Last week, Apple added a 256GB RAM configure-to-order option for the iMac Pro. Unfortunately, if you already purchased an iMac Pro with 128GB of RAM or less, upgrading to 256GB does not appear to be possible.

imac pro white background
The new 256GB RAM option consists of four 64GB memory modules, and in an internal document distributed to Apple Stores and Apple Authorized Service Providers, Apple states that the new configured-to-order ‌iMac‌ Pro is the only model designed to work with those 64GB memory DIMMs. No reason is provided.

This information suggests that Apple Authorized Service Providers will not be able to upgrade an ‌iMac‌ Pro to 256GB of RAM, nor will third-parties like OWC. In other words, purchasing an ‌iMac‌ Pro with 256GB of RAM will only be possible via the CTO option on Apple's online store during the checkout process.

256GB of RAM is a $5,200 upgrade option on Apple's online store, in addition to the ‌iMac‌ Pro's base $4,999 price.

The standard ‌iMac‌ is a bit more fortunate, as OWC has confirmed that the new 27-inch models released last week can be upgraded with up to 128GB of RAM, despite maxing out at 64GB on Apple's online store.

Related Forum: iMac

Popular Stories

iPhone SE 4 Thumb 1

iPhone SE 4 With Apple's Own 5G Modem 'Confirmed' to Launch in March

Tuesday November 19, 2024 12:12 pm PST by
Barclays analyst Tom O'Malley and his colleagues recently traveled to Asia to meet with various electronics manufacturers and suppliers. In a research note this week, outlining key takeaways from the trip, the analysts said they have "confirmed" that a fourth-generation iPhone SE with an Apple-designed 5G modem is slated to launch towards the end of the first quarter next year. In line with previo...
General Black Friday Deals 24 Green Tinsel

Apple Black Friday Deals Available Now: AirPods, iPads, and More

Friday November 22, 2024 5:28 am PST by
Black Friday 2024 is less than one week away, and as always the next few days will be the best time of the year to shop for great deals. Right now, this includes big savings on popular Apple products like AirPods, Apple Watch, MacBook Air, iPad, and more. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a purchase, we may receive a small...
at t turbo indicator iphone 16 pro max v0 8hrh7w5f3w1e1

AT&T Turbo Indicator Showing Up in iPhone Status Bar for Subscribers

Wednesday November 20, 2024 3:42 am PST by
AT&T has begun displaying "Turbo" in the iPhone carrier label for customers subscribed to its premium network prioritization service, according to reports on Reddit. The new indicator seems to have started appearing after users updated to iOS 18.1.1, but that could be just coincidence. Image credit: Reddit user No_Highlight7476 The Turbo feature provides enhanced network performance through ...
anker new xmas 1

Anker Kicks Off Massive Black Friday Sale With Up to 50% Off Sitewide, Free Gifts With Purchase, Mystery Boxes, and More

Thursday November 21, 2024 7:53 am PST by
Anker today kicked off its big Black Friday sale, which is set to run through December 9. This sale includes notable discounts on portable chargers, USB-C hubs, cables, and more. Note: MacRumors is an affiliate partner with Anker. When you click a link and make a purchase, we may receive a small payment, which helps us keep the site running. There are a few bonus offers during this event as ...
Apple 2024 Black Friday Shopping Event feature

Apple Announces 2024 Black Friday Event, Offering Up to $200 Gift Card

Thursday November 21, 2024 5:10 am PST by
Apple's annual four-day Black Friday through Cyber Monday shopping event is returning on Friday, November 29 through Monday, December 2 in many countries, including the U.S., Canada, Australia, France, Germany, Italy, Spain, the U.K., and others. During the event, customers can get an Apple gift card with the purchase of an eligible product. In the U.S., for instance, Apple is including gift ...
silo tv show apple tv plus

Apple TV+ Releasing Next Week's 'Silo' Episode Early

Friday November 22, 2024 7:25 am PST by
The next episode of Apple TV+'s award-winning sci-fi series "Silo" will be released early. Apple previously announced that new "Silo" episodes would be released on Fridays, but the third episode of the second season will instead be released on Wednesday, November 27. Apple has likely bumped up the date so that people can watch the episode during the U.S. Thanksgiving holiday on Thursday,...
apple card feature2

Apple Card 3% Daily Cash Back Now Available From Two More Apple Partners

Tuesday November 19, 2024 10:36 am PST by
Apple has partnered with select merchants to offer Apple Card users three percent Daily Cash back on their purchases, and two new companies were added to the partner list today. When purchasing goods and services from Booking.com and ChargePoint, Apple Card users will now get more cash back. Booking.com is a site for reserving flights, cars, cruises, and hotels, while ChargePoint sells...
Generic iOS 18 Feature Real Mock

Apple Releases iOS 18.1.1 and iPadOS 18.1.1 With Security Fixes

Tuesday November 19, 2024 10:10 am PST by
Apple today released iOS 18.1.1 and iPadOS 18.1.1, minor updates to the iOS 18 and iPadOS 18 operating systems that debuted earlier in September. iOS 18.1.1 and iPadOS 18.1.1 come three weeks after the launch of iOS 18.1. The new software can be downloaded on eligible iPhones and iPads over-the-air by going to Settings > General > Software Update. Apple has also released iOS 17.7.2 for...

Top Rated Comments

PinkyMacGodess Avatar
74 months ago
Should Apple retire the 'Pro' name. It's obvious they can't deliver. Sad, really... And I cling to my Macpro4,1 hoping it lasts a few more years.

EDIT: My point is that 'Pro's' need flexibility. If there is no physical way to upgrade the system, then it's either buy top of the line, or look elsewhere. The closed agenda has to be costing them some users, one would think...
Score: 36 Votes (Like | Disagree)
bevel Avatar
74 months ago
Surprise! Who'd have thought Apple would pull more of this ****?!
Score: 29 Votes (Like | Disagree)
falainber Avatar
74 months ago
Oh no! Limited to a plebian 128GB of RAM on the most RAM-efficient OS available! What ever will we do? /s
In desktops, RAM is mostly needed for apps not OS.
Score: 27 Votes (Like | Disagree)
PinkyMacGodess Avatar
74 months ago
"Pro" stands for "proficient"
Or 'PROfit' as people have to upgrade to get more memory?
Score: 22 Votes (Like | Disagree)
Plutonius Avatar
74 months ago
I'm not sure what professionals are in the market for an iMac Pro if they need 256 Gig. Until Apple comes out with a revised Mac Pro, I would probably looking at non-Apple solution for a lot less money.
Score: 21 Votes (Like | Disagree)
BaccaBossMC Avatar
74 months ago
Oh no! Limited to a plebian 128GB of RAM on the most RAM-efficient OS available! What ever will we do? /s
Score: 17 Votes (Like | Disagree)