27" iMac with Retina 5K Display (2019-2020) memory upgrade

Actual product may differ slightly in appearance.

Trade In Your Original Memory and SAVE!

OWC Memory Upgrades For 27" iMac with Retina 5K Display (2019 - 2020)


128GB
Up to 128GB memory
4x
Up to 4x more memory vs. factory options

Works with the following Model IDs

  • iMac20,2
  • iMac20,1
  • iMac19,1
  • Rigorously in-house lab tested. Learn more »

  • Easy DIY install videos. Learn more »

  • OWC MaxRAM Certification. Learn more »

  • Lifetime warranty with advanced replacement. Learn more »

Works with the following Model IDs

  • iMac20,2
  • iMac20,1
  • iMac19,1

Trade In Your Original Memory and SAVE!


OWC Memory

  • This Mac has four available memory slots.
  • Install in pairs for best performance.
  • All installed memory should be the same speed for best performance.
  • Backed by an OWC Limited Lifetime Warranty.
OWC Memory

NOTE: For 27-inch iMac (2020) models — iMac20,1 and iMac 20,2 — OWC recommends that all DIMMs be the same capacity, speed, and manufacturer to ensure optimal memory performance.

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 (2019) 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 18TB drive for more storage and backup capacity!

Learn More »

OWC HDD to SSD Upgrade Kit for iMac

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