New 27-Inch iMac Supports Up to 64GB of RAM, OWC Offering Upgrade Kits - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

New 27-Inch iMac Supports Up to 64GB of RAM, OWC Offering Upgrade Kits

Apple's line of newly updated 5K Retina 27-inch iMacs with Skylake will support up to 64GB of RAM, an upgrade from the previous-generation 27-inch Retina iMacs that would only support a maximum of 32GB of RAM. According to OWC, The current 27-inch Retina iMac includes four memory slots that support up to 16GB of memory per slot for a total of 64GB.

newimac64gbram

Image via OWC

Build-to-order options for the 27-inch Retina iMacs only allow it to be purchased from Apple with a maximum of 32GB RAM, but OWC will offer 16GB modules in 48GB and 64GB configurations for the new iMac. OWC plans to start selling its new 48 and 64GB kits tomorrow, and pricing is as follows:

- Single 16GB module - $329.99

- 32GB Kit using 16GB x 2 Modules - $599.00

- 48GB Kit with 16GB x 2 + 8GB x 2 - $729.00

- 64GB Kit with 16GB x 4 - $1195.00

The new 27-inch iMacs were announced this morning and are available from Apple retail stores and Apple's online store. Pricing for the machines starts at $1,799 for a 3.2GHz quad-core processor, 8GB RAM, 1TB hard drive, and an AMD Radeon R9 M380 graphics card.

Update: OWC has torn down the new 21.5-inch 4K Retina iMac and has learned that the memory is soldered in, which means it can't be upgraded. Customers purchasing a 21.5-inch Retina iMac should get the maximum amount of memory they can afford at the time of purchase as there will be no third-party upgrade options. The maximum amount of RAM for the 21.5-inch iMac models is 16GB.

Related Roundup: iMac
Buyer's Guide: iMac (Don't Buy)
Related Forum: iMac

Popular Stories

Aston Martin CarPlay Ultra Screen

Apple Says CarPlay Ultra is Coming to These Vehicle Brands

Thursday May 21, 2026 11:53 am PDT by
Last year, Apple launched CarPlay Ultra, the long-awaited next-generation version of its CarPlay software system for vehicles. Nearly a year later, CarPlay Ultra is still limited to Aston Martin's latest luxury vehicles, but that should change fairly soon. In May 2025, Apple said many other vehicle brands planned to offer CarPlay Ultra, including Hyundai, Kia, and Genesis. CarPlay Ultra...
ios 26 iphone 16 pro lock screen notifications feature 1

iOS 27 Notifications Will Slide in From Left Side of Your iPhone's Screen

Friday June 5, 2026 7:24 am PDT by
Bloomberg's Mark Gurman today revealed another iOS 27 change: notifications will slide in from the left side of the screen instead of from the top. In addition, accessing Notification Center on iOS 27 will require swiping down on the top-left corner of the screen. If you swipe down on the Dynamic Island area, a new "Search or Ask" interface tied to the revamped Siri will appear, instead of...
WWDC26 Mock Feature 2

Will Apple Launch New Hardware at WWDC Next Week?

Friday June 5, 2026 7:56 am PDT by
Apple has several hardware releases in the pipeline, but will we see any of them unveiled at this year's Worldwide Developers Conference? WWDC is primarily a software event where new versions of iOS, iPadOS, macOS, watchOS, tvOS, and visionOS take center stage, but it's not unusual for Apple to introduce new hardware during the developer conference. Take WWDC 2017, for example, where Apple...

Top Rated Comments

landroverz7 Avatar
139 months ago
Most users here don't need 64GB Ram, but what they do need is 64GB storage standard on iOS devices :)
Score: 35 Votes (Like | Disagree)
JXShine Avatar
139 months ago
I think the 5400rpm HDD is the part that needs upgrading.
Score: 27 Votes (Like | Disagree)
AustinIllini Avatar
139 months ago
4000 instances of Safari will be snappier
Score: 25 Votes (Like | Disagree)
Chrjy Avatar
139 months ago
How times have moved on!

MacRumors content image
Score: 19 Votes (Like | Disagree)
uid15 Avatar
139 months ago

This is great news until the next version when Apple decides it's too thick and the RAM needs to be built-in to get it just a little thinner!
It always amuses me how people seem to think the iMac is "thin" - yeah - at the EXTREMITIES, but then so am I :D
Score: 18 Votes (Like | Disagree)
uid15 Avatar
139 months ago
HUGE RAM

MacRumors content image
Score: 13 Votes (Like | Disagree)