Name: 4.0GB (2x 2GB) PC-8500 DDR3 kit for MacBook/MacBook Pro Unibody, iMac 2009, Mac mini 2009/2010
SKU: OWC8566DDR3S4GP
Price: 18.99 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.

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: 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:

Verified Buyer

Reviewer: CaliMacLover Location: Moreno Valley, CA Age: 35-44 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 Saved a dying MacBook July 24, 2018 Purchased this memory upgrade to replace a bad memory chip I had in an old 13" MacBook. It originally only had 4 gigs of memory (2 x 2 gig memory cards) and only one would read. Purchased this upgrade to get the MacBook processing a little faster and it did just the trick. Definitely still need to replace the entire MacBook but this memory upgrade works wonderfully.

Recently upgraded the hard drive and I wish I had known about this company and purchased it from them. I will be doing all my shopping for discounted Mac products here, the order was received promptly and the products are top notch.

I would recommend this item to a friend! This review is from 4.0GB PC-8500 DDR3 1066MHz SO-DIMM 204 Pin SO-DIMM Memory Module PC3-8500. Customer Videos:

Verified Buyer

Reviewer: Technomagnon Location: Middle America Age: 35-44 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Great quality, outstanding instructions! July 18, 2018 This was a simple memory upgrade and OWC made it even easier. The memory itself came quickly and well packaged to prevent any damage from mis-handling during shipping. The tutorial video walked through the process and made it very easy to repeat on my own. Again, upgrading memory isn't rocket science but this experience reminded me why I love doing business with OWC. Thank you all for another great experience!

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: europeka Location: Québec Age: Over 65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 Excellent July 17, 2018 The product is excellent and it is fast to install on my 2009 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: KeithD Location: USA Owned Product: less than a month

Rating: 5/5 Great Source July 3, 2018 Ordered memory for my Macbook on a Friday and rec'd it the following Mon. via regular mail. The price was considerably better than Amazon & other sources.

If that weren't enough my sluggish Mac is zipping along nicely with the added RAM. I should mention the support info on the site is excellent - very pleased. Keith D.

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

Verified Buyer

Reviewer: llapace Location: Tampa,FL Age: 18-24 Experience Level: Hobbiest Owned Product: 1-3 months

Rating: 5/5 Excellent experience. Great product. July 1, 2018 Sales and tech support were nothing but pleasant and helpful. New RAM works flawlessly, accompanied with SSD the boot time of my 2010 13in MBP went from over a minute to around 10 seconds.

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: nachostanda Location: Fresno, CA Age: 35-44 Experience Level: Power User Owned Product: 1-3 months

Rating: 5/5 Great RAM June 13, 2018 Boom, my stock 4gRAM late 2009 iMac is a real beast now that I've upgraded to 16g RAM from OWC. Great product and would recommend!

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: teachart68 Location: Fort Wayne, IN Age: 45-54 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 Great Inexpensive Upgrade June 6, 2018 Had a late 2009 iMac that could barely chug along. Very slow with Adobe CC. After adding the new RAM everything is much, much, much faster!

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: P2images Location: Old Saybrook Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months

Rating: 5/5 These were flawless May 14, 2018 Packed well, fast shipping, great instructions, and no memory errors.. would buy again and recommend to anyone.

I would recommend this item to a friend! This review is from 32.0GB (4x 8GB) PC3-8500 DDR3 kit for Late 2009 iMac11,1 models.. Customer Videos:

Verified Buyer Top 250 Contributor

Reviewer: MaRtYnMcfly Location: Monterrey NL, Mexico Age: 35-44 Experience Level: IT Professional Owned Product: over 6 months

Rating: 5/5 Excelent April 30, 2018 excelent work fine and easy to setup only two screws

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: Nouxboux27 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 Very happy with my purchase April 25, 2018 I upgraded my mom's 2009 iMac from the stock 2 RAM to 8. It's like a new machineI Installation was a breeze and I'm certain (based on my previous experience with OWC RAM) that the quality of the RAM is top-notch. Highly 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: MrPhysics2 Location: OKC, OK Age: 35-44 Experience Level: Power User Owned Product: 1-3 months

Rating: 5/5 Everything works as expected April 22, 2018 As usual OWC memory always works up to the levels claimed on the website even if they are above what Apple officially supports. I have never had an OWC memory chip go bad.

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:

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 $18.99

Add to Cart

Additional Capacities & Kits:

2GB
- Ships: Same Day
- Only $9.97
- $9.97
4GB
- Ships: Same Day
- Only $27.99
- Bundle Priced for $19.99
4GB (2x2GB)
6GB (2GB+4GB)
- Ships: Same Day
- Only $29.96
- Matched Kit for $28.99
8GB (2x4GB)
- Ships: Same Day
- Only $39.88
- Matched Kit for $39.88
8GB
- Ships: Same Day
- Only $39.88
- $39.88
16GB (2x8GB)
- Ships: Same Day
- Only $79.76
- Cyber Saver $78.99
16GB (4x4GB)
- Ships: Same Day
- Only $78.99
- Matched Kit for $78.99
32GB (4x8GB)
- Ships: Same Day
- Only $159.52
- Cyber Saver $149.88