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OWC Memory Upgrades

For 27" iMac with Retina 5K Display (2017)


64GB
Up to 64GB memory

Works with the following Model IDs

  • iMac18,3

OWC Memory

  • This Mac has four available memory slots.
  • Install in pairs for best performance.
  • Backed by an OWC Limited Lifetime Warranty.

Install Videos

Our step-by-step installation videos guide you through upgrading your Mac, iPhone, iPad or iPod.

View all Install Videos »
27" iMac with Retina 5K Display (2017) install video

Solid State Drives

Shop SSD specifically for your iMac Experience the true speed of your mac with an OWC SSD flash storage upgrade. Select your Model ID below.

SSDs for your SYSTEM NAME

OWC General Servicing Kit for iMac

Includes all installation tools to service all Apple iMac models released since 2008.

Learn More »

OWC General Servicing Kit for iMac

OWC HDD to SSD Upgrade Kit for iMac

Close to maxing out your factory-installed hard drive? With the OWC Internal HDD DIY Kit you can replace your old hard drive on your own with up to a 10TB drive for more storage and backup capacity!

Learn More »

OWC HDD to SSD Upgrade Kit for iMac

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