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Home  »  Memory  »  iMac  »  27" & 21.5" iMac (Late 2009)
iMac (October 2009) Memory Upgrades

Actual product may differ slightly in appearance.

OWC Memory trade-in rebate

Memory trade-in rebate

Send us your old memory when you upgrade and we'll give you a rebate!

OWC Memory Upgrades For 27" & 21.5" iMac (Late 2009)

32GB
Up to 32GB memory1

Works with the following Model IDs

  • iMac10,1
  • iMac11,1
How to find Model ID

Recommended Upgrades

iMac (Late 2009) recommend memory 1
32GB (8GB x 4)
27" iMac11,1 only
$168.99
 Buy Now
iMac (Late 2009) recommend memory 2
16GB (8GB x 2)
27" iMac11,1 only
$84.88
 Buy Now
iMac (Late 2009) recommend memory 3
16GB (4GB x 4)
$93.88
 Buy Now
  • 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.
  • Backed by an OWC Limited Lifetime Warranty.
Buying Options 1066MHz DDR3 PC3-8500 -- Maximum 32GB supported1
2GB (2GB x 1) $9.97 Learn more Buy Now
4GB (4GB x 1) $24.99 Learn more Buy Now
4GB (2GB x 2) $18.99 Learn more Buy Now
8GB (4GB x 2) $47.88 Learn more Buy Now
16GB (4GB x 4) $93.88 Learn more Buy Now
16GB (8GB x 2)
Compatible with 27" iMac11,1 only
$84.88 Learn more Buy Now
32GB (8GB x 4)
Compatible with 27" iMac11,1 only
$168.99 Learn more Buy Now

Install Videos

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

View all Install Videos »
iMac (October 2009) memory 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
  1. 27-inch iMac models (iMac11,1 and iMac 10,1) support up to 32GB total memory (maximum 8GB per slot). 21.5-inch iMac models (iMac10,1) only support up to 16GB total memory (maximum 4GB per slot).
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