Name: 4.0GB (2x 2GB) PC-8500 DDR3 kit for MacBook/MacBook Pro Unibody, iMac 2009, Mac mini 2009/2010
Brand: OWC
SKU: OWC8566DDR3S4GP
Price: 18.79 USD
Availability: InStock
Rating: 4.97 (749 reviews)

4.0GB OWC Memory Upgrade Kit

2 x 2.0GB PC8500 DDR3 1066MHz 204 Pin

OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program | 30 Day Money Back Guarantee

Product Specs:

Technology: DDR3 SDRAM
Density: 2GB (2048MB)
RoHS: Yes
Comp. Count: 16
Depth: 256Mb
Width: x64
Pin Count: 204-pin
Op. Temp.: 0C to +85C
Data Rate: DDR3-1066
Speed: PC3-8500
CL: CL = 7
Cycle Time: 1.875ns
Voltage: 1.5V
Comp. Config: 128 Meg x 8
ECC: Non ECC
Module Ranks: Dual Rank
Register: Non Parity
Low Noise 8-Layer PCB
Meets and/or Exceeds Apple/Intel Specifications
Fully compliant with JEDEC specifications
Free Installation Videos & Manuals
Warranty Safe Upgrade.
OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program
Why do I need more RAM?

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.

- Please allow up to 14 Days from the time we receive your memory for testing and rebate processing.
- The OWC Rebate is for up to the same number of memory modules purchased and must be in working order.

COMPATIBILITY
Reviews
RATINGS

This OWC Memory is compatible with... Learn how to find your Mac's model ID or PC specs

MacBook (Mid 2010)

(May, 2010)

Model ID: MacBook7,1

2.4GHz

Detailed specs

MacBook (Late 2009)

(October, 2009)

Model ID: MacBook6,1

2.26Ghz

Detailed specs

Install Videos

MacBook (Late 2008)

(October, 2008)

Model ID: MacBook5,1

2.0GHz, 2.4GHz

Detailed specs

Install Videos

MacBook Pro (17-inch Mid 2010)

(April, 2010)

Model ID: MacBookPro6,1

2.53GHz, 2.66GHz, 2.8GHz

Detailed specs

Install Videos

MacBook Pro (17-inch Mid 2009)

(June, 2009)

Model ID: MacBookPro5,2

2.8GHz, 3.06GHz

Detailed specs

Install Videos

MacBook Pro (17-inch Early 2009)

(January, 2009)

Model ID: MacBookPro5,2

2.66GHz, 2.93GHz

Detailed specs

Install Videos

MacBook Pro (15-inch Mid 2010)

(April, 2010)

Model ID: MacBookPro6,2

2.4GHz, 2.53GHz, 2.66GHz, 2.8GHz

Detailed specs

Install Videos

MacBook Pro (15-inch Mid 2009)

(June, 2009)

Model ID: MacBookPro5,4

2.53GHz

Detailed specs

Install Videos

MacBook Pro (15-inch Mid 2009)

(June, 2009)

Model ID: MacBookPro5,3

2.66GHz, 2.8GHz, 3.06GHz

Detailed specs

Install Videos

MacBook Pro (15-inch Early 2009)

(March, 2009)

Model ID: MacBookPro5,1

2.66GHz 2.93GHz

Detailed specs

Install Videos

MacBook Pro (15-inch Late 2008)

(October, 2008)

Model ID: MacBookPro5,1

2.4GHz, 2.53GHz, 2.66GHz 2.8GHz

Detailed specs

Install Videos

MacBook Pro (13-inch Mid 2010)

(April, 2010)

Model ID: MacBookPro7,1

2.4GHz, 2.66GHz

Detailed specs

Install Videos

MacBook Pro (13-inch Mid 2009)

(June, 2009)

Model ID: MacBookPro5,5

2.26GHz, 2.53GHz

Detailed specs

Install Videos

iMac (27-inch Late 2009)

(October, 2009)

Model ID: iMac10,1; iMac11,1

2.66GHz, 2.8GHz, 3.06GHz, 3.33GHz

Detailed specs iMac10,1

Detailed specs iMac11,1

Install Videos

iMac (24-inch Early 2009)

(March, 2009)

Model ID: iMac9,1

2.66GHz, 2.93GHz, 3.06GHz

Detailed specs

Install Videos

iMac (21.5-inch Late 2009)

(October, 2009)

Model ID: iMac10,1

3.06GHz, 3.33GHz

Detailed specs

Install Videos

iMac (20-inch Early 2009)

(March, 2009)

Model ID: iMac9,1

2.66GHz

Detailed specs

Install Videos

Mac mini (Mid 2010)

(June, 2010)

Model ID: Macmini4,1

2.4GHz, 2.66GHz

Detailed specs

Install Videos

Mac mini (Mid 2010 Server)

(June, 2010)

Model ID: Macmini4,1

2.66GHz

Detailed specs

Install Videos

Mac mini (Late 2009)

(October, 2009)

Model ID: Macmini3,1

2.26GHz, 2.53GHz, 2.66GHz

Detailed specs

Install Videos

Mac mini (Late 2009 Server)

(October, 2009)

Model ID: Macmini3,1

2.53GHz

Detailed specs

Install Videos

Mac mini (Early 2009)

(March, 2009)

Model ID: Macmini3,1

2.0GHz, 2.26GHz

Detailed specs

Install Videos

PC Laptops

Compatible with Intel / AMD Process based PCs capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B.

Reviews

Customer Ratings

Write a Review 4.9 / 5 729 out of 749 (97%) reviewers would recommend this product

1 2 3 4 5 6 7

Verified Buyer

Reviewer: Dahon Location: Belgrade, Serbia Age: 55-65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 a good solution for my problem with disk January 21, 2019 A few months ago, I filed an objection to disk quality (120GB OWC Mercury Electra 3G SSD 7MM), which after a short period of installation failed. But after I wrote my remark to OWC and MacSales.com, the company OWC replaced the old disk with a new one in very short time. I take this opportunity to thank the OWC for efficient problem solving and a high professional level and to recommend OWC and MacSales.com to all future customers on this official website.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: Digby Location: Western Australia Age: 45-54 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 Awesome product January 6, 2019 Perfect! My macbookpro flies now… excellent speed

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for 27" iMac 2009, Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer

Reviewer: DuffENator

Rating: 5/5 Ram always helps December 27, 2018 I was given a free 2009 20-inch iMac, 2.66 Ghz that only had 2 GB ram. Wiped it and installed El Capitan, the last OS it could handle, 10.11.3.

Slow as molasses. Painfully slow. Too be expected though. The GPU is old, as is the CPU. Tweaked the prefs to turn off the fancy transparency stuff, but still slow. Just maxing out the ram to 8GB helped immediately. Activity monitor showed before almost all the ram was being used just to run the OS, lol.

This upgrade helped a lot. Also replaced the HD with an SSD, which helped this old machine astronomically. But that's in another review.

Using this old mac as an email server. Working like a champ. Ram helps.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: Colender Location: MI Age: 55-65 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 Exactly what I needed November 21, 2018 This was perfect to give a performance boost to an old Mac Book Pro I am refurbishing

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: Dirk Location: Monterey, C.A. Age: 55-65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 Great upgrade and easy to install! November 13, 2018 Had zero difficulty installing the product. Great upgrade for the price! Definitely Recommended!

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: expectant Location: Long Island N Age: Under 18 Experience Level: Home User Owned Product: over 6 months

Rating: 4/5 Installation flawless - outcome ok November 6, 2018 The installation of 16GB of ram in my IMAC was flawless. The instructions were excellent. I discovered a fair amount of dust bunny stuff in the compartment and this needs attention. After I closed up the IMAC and turned it on, it booted flawlessly. Then the major question: was peformance better? The answer is a qualified yes. Some of the delay was not improved and may relate to my Cable Service (Optimum) and some may relate to performance issues with Chrome. So the outcome was positive but maybe not the tremendous increase of speed that I expected. No fault of this wonderful company.

This review is from 16.0GB (4x 4GB) PC-8500 DDR3 kit for all Apple iMac 21.5" and 27" Models (Oct/2009). Customer Videos:

Verified Buyer

Reviewer: ebis Location: basel Age: 45-54 Experience Level: Noob Owned Product: less than a month

Rating: 5/5 I upgraded my macbook aluminium from 2 to 8GB and it is performing really well November 1, 2018 I upgraded my macbook aluminium from 2 to 8GB and it is performing really well

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: IMacMan Location: New York City Age: Over 65 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 Like New October 29, 2018 OWC/MacSales.com was a pleasure to deal with. To make sure I ordered the correct memory upgrade for my IMac, I called and spoke with a tech representative. He checked carefully with me and then re-assured me what to order. The upgrade kit was delivered as ordered. Once installed (which was easy and took only about 10 minutes), the computer worked as quickly as it did when I first purchased it years ago. Very happy with OWC. I already recommended them to a friend and would definitely order from them again.

I would recommend this item to a friend! This review is from 16.0GB (4x 4GB) PC-8500 DDR3 kit for all Apple iMac 21.5" and 27" Models (Oct/2009). Customer Videos:

Verified Buyer

Reviewer: HotSpot Location: Homer, AK Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months

Rating: 5/5 Simple Upgrade · Great Result October 25, 2018 I just upgraded my MacBook (13-inch, Mid 2010) from 8GB RAM to 16GB RAM. OWC makes it so easy to order the right parts by making sure you select the right MacBook model and ID. In my case, this was a MacBook7,1. I ordered with confidence, they shipped the next day!

When it arrived, I went directly to the Install Videos they provide for my model MacBook7,1 and the hardest part was unscrewing the 8 itty-bitty screws! I was grateful that I had already had purchased my screwdriver kit from OWC years ago.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for 27" iMac 2009, Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer

Reviewer: Hank Location: San Diego, CA Age: 25-34 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Great Parts, Fast Shipping October 24, 2018 RAM is always an easy upgrade on any computer and these showed up quickly and in professional packaging. Work wonderfully after days of heavy use. WOuld recommend to anyone trying to liven up an older macbook!

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: federash

Rating: 5/5 good service October 16, 2018 I would recommend this item to a friend! This review is from 8.0GB PC3-8500 DDR3 1066MHz SO-DIMM 204 Pin SO-DIMM Memory Module PC3-8500. Customer Videos:

Verified Buyer

Reviewer: Dirk Location: Monterey, C.A. Age: 55-65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 Great, works as intended! September 24, 2018 We talked with the representatives about my computer before ordering and I ordered what he had recommended. Easy to install. So far so good. Thanks for the help.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for 27" iMac 2009, Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer

Reviewer: 12huserr Location: Columbus, IN Age: 25-34 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 Great upgrade!! September 5, 2018 Great upgrade for the price, easy install.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: Kracka Age: 35-44 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Improved the performance of my MacBook Pro September 2, 2018 Running High Sierra on a MacBook Pro (15-inch, Mid 2010), these memory chips greatly helped the stability and performance. Easy to install, power down, flip macbook over, just note which screws are the long ones on the bottom(3 in total), press tabs on each side of old memory chipsets, carefully remove when they pop up, insert new chipset. Power up and it's automatic from there, once it loads the desktop and settles suggest doing at least one restart to ensure changes took place.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: Khair Location: My

Rating: 5/5 RAM for MacBook Pro 2010 August 25, 2018 Excellent services. Never regret to order from them. Recommended

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: miki

Rating: 5/5 Great product August 17, 2018 Bought this RAM to boost the performance of my MBP 2010 13". Very satisfied with the product. Had no issues during installation or runtime of the system.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for 27" iMac 2009, Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer

Reviewer: Bargainhunter Location: Baltimore, MD Age: 55-65 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 easy to order. easy to use. Dramatic results August 15, 2018 I would recommend this item to a friend! This review is from 16.0GB (4x 4GB) PC-8500 DDR3 kit for all Apple iMac 21.5" and 27" Models (Oct/2009). Customer Videos:

Verified Buyer

Reviewer: u2fan003

Rating: 5/5 Great! August 13, 2018 Got my 8-year-old MacBook working really fast, great product & service! Had quick query to ask on online chat and was replied to instantly, with great help. Thanks OWC!

I would recommend this item to a friend! This review is from 8.0GB PC3-8500 DDR3 1066MHz SO-DIMM 204 Pin SO-DIMM Memory Module PC3-8500. Customer Videos:

Verified Buyer

Reviewer: Need4Speedrw Location: Hamilton, Ontario, Canada Age: 45-54 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 Memory Upgrade, Mac Mini 4.1 (16 GB) August 7, 2018 Received shipment quickly and the item was well packaged. I installed 2, 8 GB ram modules in all of about five minutes with zero difficulty. Turned the Mac Mini on and it recognized the new RAM almost instantaneously. There's a definite improvement over having just 2 x 2 GB in this Mac Mini (mid 2010). Thank you OWC, very satisfied with this purchase!

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for 27" iMac 2009, Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer

Reviewer: retiredguy Location: Austin, TX Age: Over 65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 Don't hesitate to upgrade your ram August 7, 2018 Great service and very helpful--called to confirm I was ordering the right ram and got great advise. The video instruction they provide is excellent-I am a home owner user with very little talent but upgrading the ram in my Mac desktop, late 2009 27 inch, was a 5 minute job. The core must accept the ram and in my case did--I7 core model 11,1 Even though the title of the product may not incorporate your particular model, as in my case the ram fits and a phone call was all that I needed to complete the order. Great guarantee so just do it! Increasing the ram really helps, especially considering that operating system upgrades can slow your computer over time.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for 27" iMac 2009, Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer

Reviewer: SteveS0353 Location: San Diego, CA Age: Over 65 Experience Level: Power User Owned Product: 1-3 months

Rating: 5/5 MacBook Life Extended August 7, 2018 My daughter's MacBook was running painfully slow with the latest OS and updated apps. The solution was to double the physical memory from 4MB to 8MB. This affordable upgrade has returned the MacBook to being responsive and extended the useful life of the MacBook.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: Ei4115 Location: Lee Center,Ny Age: 35-44 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 Just what I needed July 29, 2018 Went from 4gb to 16gb. Easy install and really speeded use my older iMac.

I would recommend this item to a friend! This review is from 16.0GB (4x 4GB) PC-8500 DDR3 kit for all Apple iMac 21.5" and 27" Models (Oct/2009). Customer Videos:

Verified Buyer

Reviewer: gdesvaux Location: Mauritius Experience Level: IT Professional

Rating: 4/5 Working good for mac mini 2.26 late 2009 July 28, 2018 No problem.

2x4Gb (total 8Gb Ram)

Working Perfectly for my Mac Mini 2.26 Late 2009

Thanks

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10. Customer Videos:

Verified Buyer

Reviewer: macbook70 Location: phoenix, az. Age: Over 65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 money well spent July 26, 2018 I purchased my macbook in 2008, the late, intel, aluminum body. it came with 2gb of memory and the upgrade then to 4 gb was $200. I just installed the 4gb of memory i purchased from OWC for $32. An fyi, the youtube video about installation instructs one to use a 00 philips screwdriver, WRONG, one needs the 000 phillips. The installation went great and my macbook is now much quicker. Also of note, the delivery was just a couple days and securely packaged.

I would recommend this item to a friend! Customer Videos:

Verified Buyer

Reviewer: JimmyMTL Location: Ottawa, Ontario Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months

Rating: 5/5 Easy Peasy Lemon Squeezy July 25, 2018 The RAM was a breeze to install with one minor hiccough, the notches on my motherboard were inverse to those on the video. Since the RAM is notched, and since I could see how the others were installed, it was simple and fast.

Great product,

I would recommend this item to a friend! Customer Videos:

1 2 3 4 5 6 7

OWC Memory 4.0GB 2 x 2.0GB PC8500 DDR3 Mfr P/N: 8566DDR3S4GP OWC SKU: OWC8566DDR3S4GP OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day

Reviews (749)

only $18.79

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