iMac (October 2009) Memory Upgrades

Actual product may differ slightly in appearance.

Trade In Your Original Memory and SAVE!

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


32GB
Up to 32GB memory1

Works with the following Model IDs

  • iMac11,1
  • iMac10,1
  • 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

  • iMac11,1
  • iMac10,1

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

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

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

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 »

HDD to SSD Upgrade Kit for iMac

Recommended Items

4.0TB OWC Mercury Elite Pro USB3/C High-Performance Drive
New Price

4.0TB OWC Mercury Elite Pro USB3/C High-Performance Drive

Exceptional Reliability, Performance, Style for your plug & play data needs!

$199.99
Save $75
Add to Cart
4.0TB Toshiba MD08ADA Series 3.5" 7200RPM HDD

4.0TB Toshiba MD08ADA Series 3.5" 7200RPM HDD

High-performance Serial ATA 6.0Gb/s 7200RPM drive w/ 128MB cache

$149.99
Save $20
Add to Cart
NewerTech Voyager Dock for 2.5" & 3.5" Drives

NewerTech Voyager Dock for 2.5" & 3.5" Drives

Plug-and-play USB 3.0/2.0 drive dock for 2.5" & 3.5" SATA HDDs & SSDs

Save $2
Add to Cart
Matias Extended Aluminum Wired Keyboard - Silver

Matias Extended Aluminum Wired Keyboard - Silver

Designed for Mac. Sleek, Beautiful + Mac Specific function keys and precision volume control dial

Add to Cart

  1. 27-inch iMac models with i5 and i7 processors (iMac11,1) support up to 32GB total memory (maximum 8GB per slot). 21.5-inch iMac models and 27-inch iMac models with Core 2 Duo processors (iMac10,1) only support up to 16GB total memory (maximum 4GB per slot).