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Product Specs:
Memory Trade in
Save money by trading in your original chips! View available memory rebates.
From the purchase date of qualifying memory from OWC, you have 60 days to trade-in your old memory for a cash rebate!
Just fill out OWC's online rebate form or contact OWC Customer Service after you receive and install your new memory.
This OWC Memory is compatible with... Learn how to find your Mac's model ID or PC specs
MacBook White Unibody
MacBook (Mid 2010)
(May, 2010)
Model ID: MacBook7,1
2.4GHz
MacBook White Unibody
MacBook (Late 2009)
(October, 2009)
Model ID: MacBook6,1
2.26Ghz
MacBook Unibody
MacBook (Late 2008)
(October, 2008)
Model ID: MacBook5,1
2.0GHz, 2.4GHz
MacBook Pro Unibody
MacBook Pro (17-inch Mid 2010)
(April, 2010)
Model ID: MacBookPro6,1
2.53GHz, 2.66GHz, 2.8GHz
MacBook Pro Unibody
MacBook Pro (17-inch Mid 2009)
(June, 2009)
Model ID: MacBookPro5,2
2.8GHz, 3.06GHz
MacBook Pro Unibody
MacBook Pro (17-inch Early 2009)
(January, 2009)
Model ID: MacBookPro5,2
2.66GHz, 2.93GHz
MacBook Pro Unibody
MacBook Pro (15-inch Mid 2010)
(April, 2010)
Model ID: MacBookPro6,2
2.4GHz, 2.53GHz, 2.66GHz, 2.8GHz
MacBook Pro Unibody
MacBook Pro (15-inch Mid 2009)
(June, 2009)
Model ID: MacBookPro5,4
2.53GHz
MacBook Pro Unibody
MacBook Pro (15-inch Mid 2009)
(June, 2009)
Model ID: MacBookPro5,3
2.66GHz, 2.8GHz, 3.06GHz
MacBook Pro Unibody
MacBook Pro (15-inch Early 2009)
(March, 2009)
Model ID: MacBookPro5,1
2.66GHz 2.93GHz
MacBook Pro Unibody
MacBook Pro (13-inch Mid 2010)
(April, 2010)
Model ID: MacBookPro7,1
2.4GHz, 2.66GHz
MacBook Pro Unibody
MacBook Pro (13-inch Mid 2009)
(June, 2009)
Model ID: MacBookPro5,5
2.26GHz, 2.53GHz
iMac Intel
iMac (27-inch Late 2009)
(October, 2009)
Model ID: iMac10,1; iMac11,1
2.66GHz, 2.8GHz, 3.06GHz, 3.33GHz
iMac Intel
iMac (24-inch Early 2009)
(March, 2009)
Model ID: iMac9,1
2.66GHz, 2.93GHz, 3.06GHz
iMac Intel
iMac (21.5-inch Late 2009)
(October, 2009)
Model ID: iMac10,1
3.06GHz, 3.33GHz
iMac Intel
iMac (20-inch Early 2009)
(March, 2009)
Model ID: iMac9,1
2.66GHz
Mac mini Intel
Mac mini (Mid 2010)
(June, 2010)
Model ID: Macmini4,1
2.4GHz, 2.66GHz
Mac mini Intel
Mac mini (Mid 2010 Server)
(June, 2010)
Model ID: Macmini4,1
2.66GHz
Mac mini Intel
Mac mini (Late 2009)
(October, 2009)
Model ID: Macmini3,1
2.26GHz, 2.53GHz, 2.66GHz
Mac mini Intel
Mac mini (Late 2009 Server)
(October, 2009)
Model ID: Macmini3,1
2.53GHz
Mac mini Intel
Mac mini (Early 2009)
(March, 2009)
Model ID: Macmini3,1
2.0GHz, 2.26GHz
PC Laptop
PC Laptops
Compatible with Intel / AMD Process based PCs capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B.

Customer Ratings

Write a Review 5 / 5 13 out of 14 (93%) reviewers would recommend this product
Verified Buyer
Reviewer: Anonymous Location: Texas Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 seamless February 7, 2016 Good price, prompt shipping, quality product. What's not to like?

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Chicago Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 Apple said 6Gb max; OWC says 8GB......Yes ! December 29, 2015 I wanted to maximize the performance of my MBP late '08. According to Apple the maximum Ram possible was 6GB. Seeing that OWC claimed that 8 would work, I took the plunge. It does work & I am reaping the benefit with Photoshop. Anyone can upgrade their Ram, its not difficult.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Daytona Beach, Florida Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Easy to buy and install thanks to OWC December 22, 2015 OWC made it easy to locate the correct memory upgrade modules for my system. The installation video was so helpful and accurate giving me confidence to make the installation myself. I am now ready to make other upgrades to my system using OWC. Thank you for a great product as well as complete installation instructions. Rw

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Venice, Italy Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 4.0GB PC-8500 DDR3 1066MHz SO-DIMM 204 Pin SO-DIMM Memory Upgrade Module PC3-8500 October 6, 2015 This product is rare, i've found only on OWC.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Age: 55-65 Owned Product: 1-3 months
Rating: 5/5 Works great April 10, 2015 The video of how to install it made it a snap!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Colorado Age: 18-24 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 It does the job! December 11, 2014 I needed to boost the RAM of my late 2009 iMac, so when I found this 4GB upgrade for much less than everywhere else I had searched, I jumped on it. The delivery was fast, even ahead of schedule, and installation was easy. I instantly noticed faster processing, which is what I needed. Couldn't be more pleased!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous
Rating: 5/5 Perfect match June 12, 2014 I would recommend this item to a friend!
Verified Buyer
Reviewer: Anonymous Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Does the job June 4, 2014 Does the job to help older iMac keep up with the times..

Verified Buyer
Reviewer: Anonymous Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Working fine May 16, 2014 I installed myself the memory, and it is running totally fine. My 2009 mac seems much quicker now, and I was able to install Maverick OS with no problem, run Photoshop and edit huge raw files like a pro :-).

The only issue I had is that I bought it from the UK, and I have to pay £20 as tax to the queen otherwise the Royal Mail wouldn't deliver it.

I would recommend this item to a friend!

Reviewer: Curcio Location: Bergenfield, NJ Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Great Memory at Great Price! February 14, 2012 With the help of OWC video I was able to replace my new memory in my MiniMac without any problem. I noticed huge diference in my Mini after installed the 2 memory. I am very satisfy with my purchase and I recommend it !

I would recommend this item to a friend!

Verified Buyer
Reviewer: pamr Location: Chile Age: 25-34 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Upgrade to 8Gb September 3, 2011 Great product, I bought two 4Gb RAM modules to upgrade my MacBook Pro 5,3 (Mid 2009), because it wasn't working like it used to, and now it just run smooth and easy (along with a new 750Gb 7200rpm Hitachi HD). I totally recommend buy this modules to upgrade any MBPro, the process it's easy and there is a video that shows you how it's done. MacSales are also great, they have a awesome call center, very helpful.

I would recommend this item to a friend!

Verified Buyer
Reviewer: MacBoy24 Location: Takoma Park Maryland Age: 25-34 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 So far so good!!!!! August 6, 2011 I just installed my new owc 4gb ram stick to my 2010 macbook pro!!! now having a total of 8gb of ram!!!!! I'm talking lightning speed from apps right to the internet!!! I'm loving it!!!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Luis88 Location: São Paulo, Brazil Age: 45-54 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 worth buying June 28, 2011 I upgraded my Mac Mini with two 4gb modules. I had them shipped to Brazil. Everything went just fine, for a fair price.

I would recommend this item to a friend!

Verified Buyer
Reviewer: marcosjom Location: Nicaragua Age: 25-34 Experience Level: IT Professional Owned Product: less than a month
Rating: 5/5 4GB is way better than 2GB April 28, 2011 I upgraded my Mac-Mini from 2GB (2x1GB) to 4GB (1x4GB) and bechmarked before and after. The memory speed was the same after upgrading (even with only one module installed, Apple recomend two identical modules for best performance).

I use XCode, VMWare (now moving to Parallels) and regular Apps. Now, my Mac doesn't slow down when I open a lot of Apps at the same time. Zero MB of Virtual Memory when running all my every-day apps.

Very Happy with this module, and hoping to buy the other pair to upgrade to 8GB soon.

Shipping to Nicaragua was greeat too. Arrived to home int just 7 days.

I cannot say about Quality and Durability for now. But working great so far.

I would recommend this item to a friend!

OWC Memory 4.0GB 4.0GB PC8500 DDR3 Mfr P/N: 8566DDR3S4GB MacSales.com SKU: OWC8566DDR3S4GB OWC Memory Upgrade Module Lifetime OWC Limited Warranty Ships: Same Day only $31.99
Add to CartOther World Computing 8566DDR3S4GB In Stock, Click to Buy Now