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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
iMac Intel
iMac w/Retina 5K display
(27-inch Late 2015)
(October 2015)
Model ID:iMac17,1
3.2GHz i5, 3.3GHz i5, 4.0GHz i7

Customer Ratings

Write a Review 4.9 / 5 13 out of 14 (93%) reviewers would recommend this product
Verified Buyer
Reviewer: PeterE Location: Sydney Australia Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 My iMac screams! November 8, 2016 Upgraded the memory of my iMac to 64Gb to boost performance when processing video and photos. The difference is amazing. Installation is a breeze! Macsales prices are so much better than what we can get here in Australia. But I would upgrade to first class USPS for an extra couple of bucks. The order took about 6 weeks to arrive via the cheapest option.

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

Verified Buyer
Reviewer: EddyC Location: Rotterdam, Netherlands Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Easy ordering, easy installation October 4, 2016 ordered 2x16 GB memory kit for my iMac (17.1; late 2015). The memory card came with regular mail within 10 days (I live in the Netherlands). Installation was very easy. Just follow the on line instructions. The memory was recognised by my iMac, which now has 32GB of internal memory. Works great and much cheaper than original apple memory. Video editing is much faster and smoother than before.

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

Verified Buyer
Reviewer: Synapco Location: Colorado Age: 55-65 Experience Level: Power User Owned Product: 3-4 months
Rating: 5/5 Memory Upgrade Kit (32GB) September 15, 2016 Received this product in a timely manner. No issues with the packaging and installation. Added this to my new 5K, 27-inch Late 2015 Retina iMac. Over the years I have made several purchases from Other World Computing - MacSales.com and have never had issues. Would highly recommend anyone to consider them for their purchases.

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

Verified Buyer
Reviewer: Anonymous Location: Phoenix, AZ Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Works perfectly June 15, 2016 I've been using iMacs since I purchased my first one in 2001. OWC provides me with exactly what I am looking for in a product.

The memory upgrade kit that I purchased from OWC arrived on time, contained no defects, and works exactly as advertised from day one without any glitches or failures. All of the OWC memory I've purchased over the years has lasted for the life of the iMac.

Aside from the price being a little high there is nothing more I could ask of the memory I bought, 48GBs in total makes the new iMac run great.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: California Age: 25-34 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Easy to install, works perfectly! June 13, 2016 Installation took less than 5 minutes, it was easy to follow OWC's instruction video, and my iMac recognized the RAM with no issues and it's working awesome.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: New York City Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 A GREAT UPGRADE June 2, 2016 I bought a new 27" 5k iMac i7 and immediately added 32GB of OWC memory to the existing 16GB. I don't know if I'll need it but my experience with an 8 year old iMac tells me to go big on memory. Everything is working well and it was easy to install.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Hong Kong
Rating: 5/5 Excellent performance May 23, 2016 The ram work perfectly with my late 2015 27" iMac. Now I can work smooth with lightroom, photoshop and other application together without lag. It's worth for the price!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Tokyo, Japan Age: 45-54 Experience Level: Power User Owned Product: 3-4 months
Rating: 5/5 Perfect Memory Size Upgrade May 20, 2016 For my late 2015 27inch iMac, I bought the 32Gig memory upgrade kit / set.

It's 'memory,' so it doesn't really lend itself to discussions on reliability or durability so much. Having said that, I did the research and far more knowledgable minds than mine concur that OWC's memory is first class in terms of being quality components.

What I can talk about is the huge impact this size memory kit has had on my computer's performance. Paired with the base 8 Gigs, I now have 40 Gigs of memory. My machine flies. Memory pressure is now non existent. Even when doing relatively complicated things in Photoshop with many layers, the cache stays empty. I now no longer have to shut down other apps when I want to use Lightroom, Photoshop or Capture One.

Also, I noticed that my CPU now runs near maximum when using said apps. At first I didn't understand this, but some more research shows that the extra memory headroom allows the CPU to function fully, or rather, to be fully utilised. The memory headroom allows it to bring to bear its full power on processes. I guess this is also part of what makes things seem so zippy now. It's not just that it can hold everything it needs in the memory, it can also 'think' better.

The speed of OWC's service was outstanding. My package arrived half way around the world at about the time I thought they would be just getting around to posting it. The staff must have gotten my order out the door really quickly. And also the answering of questions was fantastic too, I might add.

Anyway, for what it is worth, I am extremely satisfied with this purchase. I can clearly see a difference and I feel my machine has been 'enlivened.'

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Onset, Ma Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 4/5 Immediate upgrade. Easy to do. Love this product. The only thing that would make this a 5 star item would be a lower price. April 16, 2016 I would recommend this item to a friend!
Verified Buyer
Reviewer: Anonymous Location: Worcester, MA Age: 25-34 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Great upgrade at great price March 8, 2016 I ordered this 32GB RAM upgrade kit to supplement the 8GB RAM that came with my iMac 5K (late 2015). By configuring my iMac with the minimum amount of RAM when I purchased from Apple, I save some cash—and the first thing I did after ordering was order this kit from OWC. It's a no-brainer.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Los Angeles Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Instant Upgrade! February 26, 2016 Added 32GB in about a minute. OWC Installation Videos make it easy to be confident that you can do your own upgrades quickly and correctly.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous
Rating: 5/5 Works with Late 2015 iMac 27 inch January 15, 2016 Everything works great -- glad that I added the additional memory to my Mac.

I would recommend this item to a friend!

OWC Memory 32.0GB 2 x 16.0GB PC3-14900 DDR3 Kit Mfr P/N: 1867DDR3S32P MacSales.com SKU: OWC1867DDR3S32P OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: 10 Days Only $499.98Matched Kit for $477.99
Add to CartOther World Computing 1867DDR3S32P, Click to Buy Now