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OWC Complete Hard Drive Upgrade Kit Including Tools for all 27" iMacs 2012 & Later
  • Required for any drive installed into the main drive bay.
  • Eliminate fan noise and maintain correct system fan control when upgrading your 2012 or later iMac.
  • The only iMac HDD upgrade option on the market certified to pass the Apple Hardware Test.
  • Fixes firmware incompatibility issues with third party hard drives.
  • Engineered in-house and backed by OWC's award-winning customer support.
  • OWC Internal SSD DIY Kit
    Already have all the tools necessary to perform this upgrade?
    Improve Performance and Capacity. Upgrade Your iMac with Confidence.
    OWC's in-line solution is the only hardware digital thermal sensor on the market allowing a third-party SATA drive to be installed in your iMac. A convenient, plug-and-play cable, the In-line Digital Thermal Sensor eliminates fan noise and maintains proper system fan control through the iMac's System Management Controller. This innovative device is designed specifically for the iMac, requires no software hacks and ensures compatibility with Apple's built-in diagnostic processes.

    Using an OWC Internal HDD DIY Kit (sold separately), replace your iMac's original hard drive with a high-capacity hard drive or a lighting fast SSD with a NewerTech Adaptadrive, for dramatic upgrades in storage capacity or data speed while maintaining the original system's fan and diagnostic performance.

    Already have the tools? Then purchase just the OWC In-line Digital Thermal Sensor.

    Note: Before attempting to perform this installation, please watch the install video below to determine your ability to perform this complex upgrade.

    Professional installation is highly recommended.

    OWC assumes no responsibility for damage that may occur during the install. Technical support for this DIY product consists only of the OWC Install Video.

    Have OWC Upgrade Your iMac
    While OWC encourages the DIY philosophy, this is a very difficult upgrade that requires advanced skills. If you are not fully confident in your ability to upgrade the drive in your 2012 iMac after watching the OWC Install Video, we recommend seeking a professional installation service.

    Includes

      • (1) OWC In-line Digital Thermal Sensor Cable
      • (2) OWC 2-1/4" Suction Cup
      • (1) Torx T10S Driver
      • (1) Torx T8S Driver
      • (1) Nylon Pry Tool (Spudger)
      • (1) OWC Screen Removal Tool
      • (1) Microfiber Screen Cleaning Cloth
      • (1) 27" iMac Adhesive tape set for proper display resealing

    NOTE: This kit contains consumable and/or one time use components and therefore is non-refundable if opened. If you have any concerns about your ability to perform the upgrade, you can return the unopened kit for a refund.
    This kit is compatible with... Learn how to find your Mac's model ID
    iMac Intel
    iMac w/Retina 5K display
    (27-inch Early 2019)
    (March 2019)
    Model ID: iMac19,1
    3.0GHz i5, 3.1GHz i5, 3.7GHz i5, 3.6GHz i9
    iMac Intel
    iMac w/Retina 5K display
    (27-inch Mid 2017)
    (June 2017)
    Model ID:iMac18,3
    3.4GHz i5, 3.5GHz i5, 3.8GHz i5, 4.2GHz i7
    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
    iMac Intel
    iMac w/Retina 5K display
    (27-inch Mid 2015)
    (May 2015)
    Model ID: iMac15,1
    3.3GHz i5, 3.5GHz i5, 4.0GHz i7
    iMac Intel
    iMac with Retina 5K display (27-inch Late 2014)
    (October 2014)
    Model ID: iMac15,1
    3.5GHz i5, 4.0GHz i7
    iMac Intel
    iMac (27-inch Late 2013)
    (September, 2013)
    Model ID: iMac14,2
    3.2GHz i5, 3.4GHz i5, 3.5GHz i7
    iMac Intel
    iMac (27-inch Late 2012)
    (November, 2012)
    Model ID: iMac13,2
    2.9GHz i5, 3.2GHz i5, 3.4GHz i7

    Customer Ratings

    Write a Review 4.8 / 5 302 out of 319 (95%) reviewers would recommend this product
    1 2 3 4 5 6 7
    Verified Buyer
    Reviewer: ClearBison-57946
    Rating: 5/5 First time perfect results July 16, 2021 The video to do the repair was excellent and even though it’s called advanced, if you follow the video, I thought it was easy. The new drive works flawlessly.

    I would recommend this item to a friend!

    Response from OWC, Support July 16, 2021 Thank you for your 5/5 review! We are so grateful to hear that you though the installation video was excellent and that you were able to easily follow the video allowing you to upgrade the drive in your iMac! Thank you for being a loyal OWC customer!
    Verified Buyer
    Reviewer: GleamingSwordfish-78860
    Rating: 5/5 Just what I needed July 3, 2021 Works like a charm in the old 2011 iMac.

    I would recommend this item to a friend! This review is from OWC In-line Digital Thermal Sensor for 27" & 21.5" iMac (2011).

    Verified Buyer
    Reviewer: AdorableDuck-97980
    Rating: 5/5 Precision Fit! June 25, 2021 This kit was a perfect fit, made very well, with simple to follow instructions… made the old iMac run looked new.

    I would recommend this item to a friend!

    Response from OWC, Support June 25, 2021 Thank you for your 5 star review! We are so happy to hear that this upgrade kit was a perfect fit for you and you were able to successfully upgrade your iMac!
    Verified Buyer
    Reviewer: FCroisetiere
    Rating: 5/5 Performed flawlessly as advertised. June 22, 2021 Just bought the 2012 iMac hard drive replacement kit. Quick delivery, just read the instructions before doing anything and watch the instructions video. Then take your time one step at a time. Very easy! My Mac perform now like brand new. Sorry Apple not buying a new one, this one has plenty more years to be used.

    I would recommend this item to a friend!

    Response from OWC, Support June 22, 2021 Hello FCroisetiere! I'm glad to hear your kind words about the Upgrade Kit. It's always wonderful to hear from happy customers.
    Verified Buyer
    Reviewer: FaithfulRoadrunner-40555
    Rating: 5/5 All worked June 22, 2021 Easy install and 100% function

    I would recommend this item to a friend! This review is from OWC In-line Digital Thermal Sensor for 27" iMac (Late 2012 - Current).

    Response from OWC, Support June 22, 2021 Hi FaithfulRoadrunner! I'm glad you're happy with the In-Line Digital Thermal Sensor. Great to hear from happy customers!
    Verified Buyer
    Reviewer: jigo
    Rating: 1/5 Adhesive tapes in the package are bad June 21, 2021 A screen fell off in a month after applying the adhesive tapes that came with a sensor. Removing adhesive and cleaning up the case was difficult.

    This review is from OWC In-line Digital Thermal Sensor for 27" iMac (Late 2012 - Current).

    Response from OWC, Support June 22, 2021 We are so sorry to hear that the adhesive did not stick correctly. We would be more than happy to look into the situation if you. I will be reach out to your shortly.
    Verified Buyer
    Reviewer: Cesar77
    Rating: 5/5 Worked as described! May 31, 2021 I used this kit to upgrade a 2017 27” iMac 3.2Ghz. Upgrading to an SSD was super simple and fun with this kit. I also bought more memory from OWC for the iMac. Now this iMac is running faster than when we first bought it!

    I would recommend this item to a friend!

    Verified Buyer
    Reviewer: dennisbond
    Rating: 5/5 No more fan noise! May 27, 2021 The sensor worked great! It returned the fan control to its normal mode instead of running continuously.

    I would recommend this item to a friend! This review is from OWC In-line Digital Thermal Sensor for 27" & 21.5" iMac (2009 - 2010).

    Verified Buyer
    Reviewer: CheerfulMongoose-81935
    Rating: 5/5 The right part for the job. May 26, 2021 This is the place to get the right parts to do repairs or upgrades for your Mac. Highly recomended.

    I would recommend this item to a friend! This review is from OWC In-line Digital Thermal Sensor for 27" & 21.5" iMac (2009 - 2010).

    Verified Buyer
    Reviewer: KindParakeet-95190
    Rating: 5/5 Awesome! May 24, 2021 runs like a new computer, Fast!

    I would recommend this item to a friend!

    Verified Buyer
    Reviewer: Faisca68
    Rating: 5/5 Excellent Kit May 14, 2021 More than happy with my shopping experience from OWC.

    I would recommend this item to a friend!

    Verified Buyer
    Reviewer: KindCaterpillar-61471
    Rating: 3/5 Not what was necessary May 10, 2021 The cutting tool was great. I had no need for the suction cups. What would have been helpful is to have multiple cards that would not stick to the adhesive so that I could insert them to keep the LCD from pressing back down on the aluminum frame. To be open/honest, I was attempting to install a OWC 3G 480GB drive into the iMac Late 2012 27" system, but it turned out that the drive was bad, which I didn't know at the time. I took it to a local Apple certified repair place and they told me the drive was bad and they also mentioned that your adhesive strips are too difficult to open back up, she stated they were like cement. You may want to reformulate your adhesives and I don't know why your 3G drive died so soon. I had thought that SSDs by their nature were more long-lasting than hard drives.

    I don't say all this to put you all down. My sincere hope is that you see the comments above and improve your kits and drives. I have used OWC in the past with great success and I hope you as a business thrive.

    Verified Buyer
    Reviewer: ToughFirefly-54110
    Rating: 5/5 1...2...3...Done! April 30, 2021 No issues. Product arrived early, all pieces were there, on line instruction video was excellent, computer is up and running smoothly....very pleased ... Thank you

    I would recommend this item to a friend! This review is from OWC Complete Hard Drive Upgrade Kit for 27" & 21.5" iMac (2011).

    Verified Buyer
    Reviewer: TameWhale-7340
    Rating: 5/5 Perfect product April 30, 2021 Worked very well with inside my iMac

    I would recommend this item to a friend!

    Verified Buyer
    Reviewer: MushyTurkey-41996
    Rating: 5/5 I'm glad I got this. April 27, 2021 The upgrade kit was a good value for the money. It came on time. The instructions were straight forward. All of the necessary items for installation were included. It required some work to install it, but working slowly and patiently, I got it done in a reasonable amount of time. I switched out a 1 TB HD in my 2011 iMac to a 4TB HD. Everything has been working well since I made this change a couple of months ago.

    I would recommend this item to a friend! This review is from OWC Complete Hard Drive Upgrade Kit for 27" & 21.5" iMac (2011).

    Verified Buyer
    Reviewer: TenseMacaw-18701
    Rating: 5/5 Worked great April 27, 2021 I was able to replace the hard drive in my iMac very easily with this kit.

    I would recommend this item to a friend!

    Verified Buyer
    Reviewer: MysteriousGazelle-85580
    Rating: 5/5 Does what it is supposed to do! April 25, 2021 Was able to replace & upgrade the hard drive in my 2010 iMac with this cable. Good stuff. If you've got an older iMac, this is probably necessary for you to be able to do the same thing.

    I would recommend this item to a friend! This review is from OWC In-line Digital Thermal Sensor for 27" & 21.5" iMac (2009 - 2010).

    Verified Buyer
    Reviewer: WanderingBat-94478
    Rating: 5/5 IMac hard drive upgrade kit April 24, 2021 The kit was great it had everything you need to do the job

    I would recommend this item to a friend! This review is from OWC Complete Hard Drive Upgrade Kit for 27" & 21.5" iMac (2011).

    Verified Buyer
    Reviewer: FairRat-661
    Rating: 1/5 Glue let go and failed April 23, 2021 Five days after installing, the screen fell out and smashed on my desk. I bought the kit and followed the online installation process to a T. Using scotch tape to hold my smashed screen in place. Total waste of money

    Verified Buyer Top 50 Contributor
    Reviewer: Kl0neMan Location: Fort Worth, TX Age: 55-65 Experience Level: Power User Owned Product: over 6 months
    Rating: 5/5 A critical part, and I am glad OWC carried it. September 14, 2020 This product is necessary to use any third party hard disk as a replacement in my iMac 27 inch. I bough it with the 6 gig drive that I used as a replacement.

    I would recommend this item to a friend! This review is from OWC In-line Digital Thermal Sensor for 27" & 21.5" iMac (2011).

    Verified Buyer Top 50 Contributor
    Reviewer: Kl0neMan Location: Fort Worth, TX Age: 55-65 Experience Level: Power User Owned Product: over 6 months
    Rating: 5/5 I am so glad OWC had this. September 14, 2020 I was replacing a failing HD in my iMac 27, and this made it easy. I have used the tools over and over again with friends iMacs too

    I would recommend this item to a friend! This review is from OWC Complete Hard Drive Upgrade Kit for 27" & 21.5" iMac (2009 - 2010).

    Verified Buyer
    Reviewer: eggman9713 Age: 25-34 Experience Level: Power User Owned Product: 1-3 months
    Rating: 5/5 Between this and the videos, the job went flawlessly. September 7, 2020 I am very impressed that this kit had all the tools I needed to replace the failed hard drive in my 2010 iMac with a new one. The video showing the entire process was also very helpful and gave me the confidence to do this repair on my own, which I'm not used to doing on an all-in-one computer. The new hard drive temperature sensor doesn't seem to work on my system, though. However I have been having trouble with other sensors so I think that is a problem unique to my system. Great kit if you already have the drive to install.

    I would recommend this item to a friend! This review is from OWC Complete Hard Drive Upgrade Kit for 27" & 21.5" iMac (2009 - 2010).

    Verified Buyer
    Reviewer: oldmac128 Location: Virginia Age: 55-65 Experience Level: Home User Owned Product: 3-4 months
    Rating: 5/5 does exactly what it says August 23, 2020 instructions make a otherwise scary operation manageable

    works without issue

    used with a SSD making the computer much more responsive.

    I would recommend this item to a friend! This review is from OWC In-line Digital Thermal Sensor for 27" & 21.5" iMac (2009 - 2010).

    Verified Buyer
    Reviewer: jsfremont Location: CA Age: Over 65 Experience Level: Hobbiest Owned Product: 1-3 months
    Rating: 5/5 Easy to install--once the iMac is opened August 4, 2020 The 2009 iMac is pretty easy to work on. It was easy to install a new SSD, but wish that the need for this sensor was more clearly stated with the purchase of an SSD.

    I would recommend this item to a friend! This review is from OWC In-line Digital Thermal Sensor for 27" & 21.5" iMac (2009 - 2010).

    Verified Buyer
    Reviewer: stevenjklein Location: Southeast Michigan Age: 55-65 Experience Level: IT Professional Owned Product: over 6 months
    Rating: 5/5 Best way to upgrade storage on old iMacs July 14, 2020 I've done several upgrades with this kit. For some iMacs I installed a newer rotational drive, and for many I've upgraded to an SSD.

    Every time it's smooth as silk, and when I'm done, the fans don't go crazy and the Mac passes diagnostics as if nothing has changed.

    Apple doesn't make it easy to upgrade storage in iMacs, but OWC makes it easier!

    I would recommend this item to a friend! This review is from OWC In-line Digital Thermal Sensor for 27" & 21.5" iMac (2009 - 2010).

    OWC Complete Hard Drive Upgrade Kit for 27" Apple iMac 2012 and later Models Mfr P/N: DIYIMACHDD12 OWC SKU: OWCDIYIMACHDD12 Hard Drive Upgrade Kit for all Apple 27" iMac 2012 and later Models for replacing the main hard drive. Includes all cables and tools necessary for installation. 1 Year OWC Limited Warranty Ships: Same Day only $47.75
    Add to CartOther World Computing DIYIMACHDD12 In Stock, Click to Buy Now
    Available iMac Kits: 2009-2010 (21.5" & 27") 2011 (21.5" & 27") 2012+ (27" Only)