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

Up to 128GB memory
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
  • Easy DIY install videos
  • OWC MaxRAM Certification
  • Lifetime advanced replacement warranty

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.


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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!

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