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Image for Crucial 4GB Kit (2 x 2GB) DDR3L-1333 SODIMM Memory for Mac from Crucial USA

Crucial 4GB Kit (2 x 2GB) DDR3L-1333 SODIMM Memory for Mac

  • Upgrade for: Apple iMac (21.5 and 27-inch, Mid 2011) iMac12,1/12,2
  • Crucial part number: CT3309302
  • Brand: Crucial
  • Form Factor: SODIMM
  • Total Capacity: 4GB kit (2GBx2)
  • Warranty: Limited Lifetime
  • Specs: DDR3 PC3-10600 • CL=9 • Unbuffered • NON-ECC • DDR3-1333 • 1.35V • 256Meg x 64 • lead free • halogen free • for Mac
  • Series: Crucial
  • view all product details
    5 stars 13 reviews
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    • $49.99
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    This part is compatible! view all compatible parts

    iMac (21.5 and 27-inch, Mid 2011) iMac12,1/12,2

    Notes about your system:

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

    21.5" - 2.5GHz Intel Quad Core i5, 2.7GHz Intel Quad Core i5, and 2.8GHz Intel Quad Core i5
    27" - 2.7GHz Intel Quad Core i5, 3.1GHz Intel Quad Core i5, or 3.4GHz Intel Quad Core i7 processor.

    Your Apple iMac (21.5 and 27-inch, Mid 2011) iMac12,1/12,2

    system specs as shipped


    • Maximum Memory:32GB
    • Standard Memory:4GB removable
    • 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 4GB Kit (2 x 2GB) DDR3L-1333 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 4GB kit (2GBx2)
    Warranty Limited Lifetime
    Specs DDR3 PC3-10600 • CL=9 • Unbuffered • NON-ECC • DDR3-1333 • 1.35V • 256Meg x 64 • lead free • halogen free • for Mac
    Series Crucial
    Module Qty 2
    Speed 1333 MT/S
    Tracer False
    Voltage 1.35V
    DIMM Type Unbuffered
    Bullet Features Increases system performance
    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: 5B426838A5CA7304
    PR file path: /pwr/96v439cu/inline/04/51/5B426838A5CA7304-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 (8)

    Reviewed by 13 customers

    Displaying reviews 1-10

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    (1 of 1 customers found this review helpful)


    My Mid 2011 Imac is a new computer again!

    By Notatechguy

    from San Diego

    Verified Reviewer

    Prep and instillation took about 15 mins. I did my work in the kitchen to avoid Static issues. I had place-mats on the counter to protect the screen. I then took the cover off and cleaned the lint from the area. I carefully removed the memory from the plastic which was super easy. I hate electronics that you have to cut plastic to get the parts. Big Props to Crucial for making the memory easy to get too.

    The hard part for me was getting the memory in. I tried a few times, and I made sure to watch the videos but still couldn't get it in. I then was able to get the memory in by first pushing the left part in and then the right part of the memory.

    I booted up the Imac and it recognized the memory right away. I can't believe how fast it is now

    For less than $50.00 I have a new computer :)


    Buy again

    By Frank

    from Upstate NY

    Product worked well and the video of the installation was very helpful since had never installed memory before.


    Worked like a charm

    By CuriousMarc

    from CA

    Verified Reviewer

    As usual, the Crucial selector found the exact right memory for my aging 2011 iMac with only 4G stock. Plug in an extra 4G, and voila, works like new again on El Capitan.

    • Was this a gift?:
    • No


    By Dashco

    from Knoxville, TN

    Verified Reviewer

    Works just as I expected. My OS Sierra upgrade slowed the 2011 iMac down, and the extra RAM from Crucial brought the speed back to what I'm used to.

    • Was this a gift?:
    • No

    great product- fast shipping

    By photo

    from virginia

    Verified Buyer

    good prices- fast shipping

    • Was this a gift?:
    • No

    (0 of 1 customers found this review helpful)


    I'm Feeling Techy

    By Terry

    from Milwaukee, WI

    Verified Buyer


    • Don't Need A 5th Grader
    • Ridiculously Easy


      Best Uses

        Purchase was accurate, on time shipping and the easiest install ever.
        Product is worth the cost.

        • Was this a gift?:
        • No

        (0 of 1 customers found this review helpful)


        Great value great service

        By Cliff

        from Chicago

        Verified Buyer


        • Easy order process
        • Fast delivery
        • The Right Product


          Best Uses

            Great service quick delivery

            • Was this a gift?:
            • No

            GREAT! EASY! NO HASSLE!

            By RTP

            from Fresno, CA

            Verified Buyer

            Had no difficulty. It was a breeze.

            • Was this a gift?:
            • No

            Good memory

            By Big Chief

            from NY

            Verified Buyer


            • Good price
            • Works perfectly


            • none

            Best Uses

              mid 2011 iMac 27 inch - added 4GB - works great and iMac runs much better with it

              • Was this a gift?:
              • No

              Memorable Experience as usual

              By Dubay

              from St Johns Florida

              Verified Buyer

              I wanted to add memory to my iMac and went to Crucial and of course received a prompt, reasonable and dependable solution. The directions and tools worked and I am a happy camper.

              • Was this a gift?:
              • No

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