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Image for Crucial 16GB Kit (2 x 8GB) DDR3L-1866 SODIMM Memory for Mac from Crucial USA

Crucial 16GB Kit (2 x 8GB) DDR3L-1866 SODIMM Memory for Mac

  • Upgrade for: Apple iMac (Retina 5K, 27-inch, Late 2015) iMac17,1
  • Crucial part number: CT7916201
  • Brand: Crucial
  • Form Factor: SODIMM
  • Total Capacity: 16GB kit (8GBx2)
  • Warranty: Limited Lifetime
  • Specs: DDR3 PC3-14900 • CL=13 • Unbuffered • NON-ECC • DDR3-1866 • 1.35V • lead free • halogen free • for Mac
  • Series: Crucial
  • view all product details
    4.5 stars 13 reviews
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    • $141.99
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    This part is compatible! view all compatible parts

    iMac (Retina 5K, 27-inch, Late 2015) iMac17,1

    Notes about your system:

    System utilizes one of the following processors:
    3.2GHz Quad-Core Intel Core i5, 3.3GHz Quad-Core Intel Core i5, or 4.0GHz Quad-Core Intel Core i7

    A 3.5" bracket is required to mount the SSD in your system. Our part number for the bracket is CTSSDCONVT.

    Your Apple iMac (Retina 5K, 27-inch, Late 2015) iMac17,1

    system specs as shipped


    • Maximum Memory:64GB
    • Slots:4 (2 banks of 2)
    *Not to exceed manufacturer supported memory.
    what does this mean?
    Memory or DRAM is the "working" memory of the computer. It's used to store data for programs (sequences of instructions) on a temporary basis.


    • Storage: Serial ATA support
    what does this mean?
    Storage drives -- hard drives and solid state drives -- are the permanent memory for the programs and documents on your computer.

    we take care of our customers

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    you may also be interested in:

    Crucial 16GB Kit (2 x 8GB) DDR3L-1866 SODIMM Memory for Mac

    product information

    Amount of available storage on the module. If there are parenthesis shown – for example (2 x 4GB) – it indicates a kit of 2 or more identical modules is used to reach the Total Capacity.
    Number of modules. Memory can be installed as single modules or in kits comprised of 2 or more identical modules. Each module requires its own slot for installation.
    Product Specifications
    Brand Crucial
    Form Factor SODIMM
    Total Capacity 16GB kit (8GBx2)
    Warranty Limited Lifetime
    Specs DDR3 PC3-14900 • CL=13 • Unbuffered • NON-ECC • DDR3-1866 • 1.35V • lead free • halogen free • for Mac
    Series Crucial
    Module Qty 2
    Speed 1866 MT/S
    Voltage 1.35V
    DIMM Type Unbuffered
    More information

    Crucial memory for Mac® systems

    Compatible with Mac systems*

    Product highlights
    • Increases Mac system performance
    • Compatible with Mac systems*
    • All DDR3 and DDR3L modules are lead- and halogen-free
    • Easy to install
    • Every single module extensively tested at the component and module level
    • Available in SODIMMs, RDIMMs, and ECC UDIMMs
    • Limited lifetime warranty

    Take the guesswork out of upgrading your Mac with Crucial memory for Mac systems. Since Apple® computers often have very specific memory requirements, including particular component densities, speeds, and SPD programming specifications, it’s important to use memory that’s engineered for your Mac. With more than a decade of experience manufacturing and developing memory for all types of Apple computers, trust Crucial memory to optimize your Mac system’s performance.

    Reliability for Mac systems
    When you use your Mac system, you expect intuitive, dependable performance. And if you’re a Mac Pro® user, you expect mission-critical workstation reliability. Expect the same out of your memory. Every module that leaves our doors has been extensively tested at the component level for voltage and temperature resistances, signal integrity, and software compatibility. Even better, modules are lead- and halogen-free.1

    Speed and energy efficiency for Mac systems
    A memory upgrade is the fastest, easiest, and most affordable way to get more performance out of your Mac system. Standard DDR3 modules help Mac systems reach speeds up to 1600 MT/s. For newer Mac systems, DDR3L modules are available. These modules deliver speeds starting at 1866 MT/s and use 10% less power for improved energy efficiency.

    Support for Mac systems
    Unsure how to install memory or have an important question about your Mac system? Let our team of experts help! Our team knows Apple systems and requirements inside and out, and we’ll provide the technical support you need – no matter which Mac system you’re using. From phone support, videos, FAQ articles, and do-it-yourself install guides for more than 70 different Mac systems, we’ve got the resources you need to keep your system up to speed.

    Micron quality — a higher level of reliability.
    As a brand of Micron, one of the largest memory manufacturers in the world, Crucial memory for Mac systems is backed by the same quality and innovation that has produced some of the world’s most advanced memory and storage technologies. With a product portfolio that includes upgrades for more than 100,000 systems, we’ve got one specifically designed for your Mac system.

    *Note that per Apple manufacturer specifications, memory can’t be upgraded on (a) many Mac systems made after mid-2012 and (b) retina-based models. Before upgrading your memory, consult your owner’s manual to verify that an upgrade is possible.

    1DDR3 and DDR3L modules only.

    product reviews

    OID: 19FEB34BA5CA7304
    PR file path: /pwr/96v439cu/inline/08/76/19FEB34BA5CA7304-en_US-1-reviews.html


    by PowerReviews

    (based on 13 reviews)

    Ratings Distribution

    • 5 Stars



    • 4 Stars



    • 3 Stars



    • 2 Stars



    • 1 Stars




    of respondents would recommend this to a friend.


    No Pros


    No Cons

    Best Uses

    No Best Uses
      • Was this a gift?:
      • No (11)

    Most Liked Positive Review


    Great customer service; RAM works perfectly

    This 32GB RAM upgrade for my Late 2015 iMac (5K, 27 inch, 4GHz Intel Core i7) installed easily, shows up in my System Report at the rated 1867 MHz, and my iMac...Read complete review

    This 32GB RAM upgrade for my Late 2015 iMac (5K, 27 inch, 4GHz Intel Core i7) installed easily, shows up in my System Report at the rated 1867 MHz, and my iMac is running even more snappily than it did with the original Apple-installed 8GB. Crucial customer service was helpful in that they gladly accepted back the memory I had first requested and received and exchanged it for the correct memory, since II had first ordered my iMac as the Mid 2015 27", and two days later Apple announced the Late 2015 model. I changed my Apple order, and found out later that the memory (which I had already ordered from Crucial based upon the older model) had also changed. They made the process painless, and again, the RAM works great.


    Most Liked Negative Review


    do not buy this for your 2015 iMac

    This RAM causes my late 2015 imac to crash AND it the system recognizes it as 1333Mhz. When I called Crucial, they basically told me I was out of luck and that I should...Read complete review

    This RAM causes my late 2015 imac to crash AND it the system recognizes it as 1333Mhz. When I called Crucial, they basically told me I was out of luck and that I should just put up with it cause there isn't much of a difference anyhow. I'll try calling again to get someone who might actually help.. but really disappointed in Crucial this time.

    Reviewed by 13 customers

    Displaying reviews 1-10

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    Great customer service and fast delivery!

    By Hendrixgirl

    from Florida

    Verified Reviewer

    Received the memory for my iMAC very quickly and installed it in less than 5 minutes. The staff helped me find the right upgrade and provided easy how to install instructions.

    • Was this a gift?:
    • No

    (1 of 2 customers found this review helpful)


    Not Compatible With Mac--No Good Support

    By Jay Jay

    from Chicago, IL

    Verified Reviewer

    This RAM is not compatible with Mac OEM equipment. It's a known issue to Crucial, but they were unwilling to back their product, and continue to advertise that it is compatible. FALSE statements on web--this is NOT compatible with Mac hardware. Support told me that it is a KNOWN ISSUE, but that they would not accept the return, or offer a solution other than to buy more of their RAM! Since it was installed, I've had random shutdowns and restarts--unpredictable, unstable system. DO NOT BUY.

    • Was this a gift?:
    • No

    Excellent Product and Service

    By Cindy P. Canty of C.Canty Studios

    from Spartanburg, S.C.

    Verified Reviewer

    I ordered Crucial's 16GB Kit (2 x 8GB) DDR3L-1866 SODIMM Memory for my iMac. My order was shipped immediately and delivered quicker than I expected. This is the third time I've ordered products from Crucial and I will continue to do so. I am very satisfied with their products and customer service.

    • Was this a gift?:
    • No

    Would not hesitate to buy again.

    By Leroy

    from OHIO

    Verified Reviewer


    • Fit Exactly As Advertised
    • Installed Memory In 5 Min
    • System Fired Up Immediate


    • Zero Downside

    Best Uses

      Installed in iMac 5K retina display

      • Was this a gift?:
      • No

      Works great

      By Gh

      from Mn

      I added these 2 gig sticks to the 2 4 gigs already in the mac and it worked fine.

      • Was this a gift?:
      • No

      The right answer

      By Caramelion

      from Baltimore

      Verified Reviewer

      I searched long and hard for the right brand of RAM for my new Mac and decided to go with Crucial. I bought two 2-packs of 8GB to max out the slots in my computer and haven't had any issues yet. I'm not the type to abuse things so I don't anticipate any but only time will tell.

      • Was this a gift?:
      • No

      even I could install

      By ramamom

      from indialantic, fl

      Verified Reviewer

      Customer service was superlative.
      Easy to install. (Stuff like this is usually scary for me.)
      When I got back screwed back computer worked like a dream.
      So far everything is great. Was able to totally upgrade my computer myself. Close to a miracle.

      • Was this a gift?:
      • No

      Worked Right Away Perfectly

      By Markus777

      from Nanaimo BC

      Verified Reviewer


      • Great Choice For Me
      • Voila


        Best Uses

          1867 is currently so new nobody locally carries it and Apple doesn't sell it directly (you have to order it installed when you buy the machine). I just bought the 16 Gb kit for my iMac and received it the other day and popped those 2 bad boys into my 5K iMac. Voila! I now have 24 Gb iMac! My iMac now runs Maya as it should (stable) and I can render any size image without it choking and crashing. Also, the general performance is much more snappy and reliable.

          • Was this a gift?:
          • Yes

          (1 of 1 customers found this review helpful)


          Works Perfectly

          By FC RN

          from Sacramento, CA

          Verified Reviewer

          Works perfectly. Wanted best performance and compatibility on my new iMac 27" i5 5K Retina, so I installed 4 of these and replaced the two 4G that came with the system.

          When compared to Apple pricing, 1/4 of the cost of 32GB from Apple with new system purchase.

          Ran memory hardware diagnostics and informal 'bench test'. Memory clocks out at the Apple spec of 1867mhz.

          • Was this a gift?:
          • No

          (1 of 1 customers found this review helpful)


          Works like a charm

          By Doughejc

          from Boise, ID

          Verified Reviewer

          Recently bought a late 2015 i5, 8 gb ram, fusion 2 gb, with Radeon 395 iMac 27". Living in Boise the name Micron has been common place for the better part of 20 years. I ordered the product, it literally arrived a day later (benefit of living so close to the shipping location). I was concerned at first, after reading reviews that perhaps I would be let down by this RAM.
          The installation was a breeze with the MAC setup, though I wasn't certain at first that the RAM had been fully seated. After loading the Mac back up I found "Dr. Clean" app was showing far less system memory utilization. I went to "About my Mac" to ensure that it was show all sticks, as well as the correct bus speed of 1867 MHz; sure enough there it was.
          I have also run some benchmarks through well known, standard Mac benchmarking software and found that the Crucial ram was actually operating at a higher speed than the OEM apple. Thus far everything has been peppy, responsive, and reliable. Stress test under major commercial photo editing software blazed through anything I threw at it. As a whole I am delighted with the purchase and the money saved. Well done Crucial on providing a great product at a very reasonable price.

          • Was this a gift?:
          • No

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