Free Shipping available on most orders $49.00 & up.

Get Details. »
OWC In-line Digital Thermal Sensor for Hard Drive Upgrade for 27" iMacs 2012 and 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
    This item does not include installation tools.
    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 up to an 8.0TB 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..

    If you need an upgrade kit with tools, you can purchase the OWC Internal HDD DIY Kit.

    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, you can have OWC upgrade your iMac where our certified technicians will expertly upgrade your iMac and ship it back to you.

    Includes

    • (1) OWC In-line Digital Thermal Sensor Cable
    • (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 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

    Install Video

    Professional installation is highly recommended.

    Customer Ratings

    Write a Review 4.9 / 5 66 out of 69 (96%) reviewers would recommend this product
    1 2 3 4 5 6 7
    Verified Buyer
    Reviewer: MacFixer Location: Ontario, Canada Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
    Rating: 5/5 It "just works" June 14, 2018 The 2009 and 2010 iMacs used a hard drive with 'unique' thermal sensing that isn't used on other non-Apple hard drives. This little temp sensor lets you use any ordinary hard drive as a replacement. It installs on the hard drive easily and there have been no compatibility issues with my mid-2010 27" iMac running High Sierra 10.13.5. Mind you, opening the iMac isn't the easiest but with the proper tools and the helpful video on the Other World Computing website it is quite do-able if you are careful. Highly recommended. I just wish Apple hadn't used those weird drives in the first place!

    I would recommend this item to a friend! This review is from OWC HDD Compatibility for Apple late 2009 to mid 2010 iMac 21.5" and 27" Models with SMC Compatibility.. Customer Videos:

    Verified Buyer
    Reviewer: TMac
    Rating: 5/5 Contained everything I needed June 4, 2018 This kit contained everything I needed to open up my iMac and access the internals to swap out the drive. Note that I combined with a separate kit for the components used in the drive swap I did.

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple 2011 iMac 21.5" and 27" Models. Customer Videos:

    Verified Buyer
    Reviewer: Lipi007 Location: Paks Age: 25-34 Experience Level: IT Professional Owned Product: over 6 months
    Rating: 5/5 Everything OK! June 4, 2018 Everything OK!

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

    Verified Buyer
    Reviewer: W0ggyPaul Location: Portland, OR Age: 55-65 Experience Level: IT Professional Owned Product: less than a month
    Rating: 5/5 Fantastic Kit May 17, 2018 I bought this and the SSD Drive Adapter, and the process was a breeze. The online video was excellent, and everything needed was provided in the kit. I was concerned about breaking the glass, so I had put this off for some time, but after using this kit and video instruction, I would not hesitate to do it again, or recommend it to someone else.

    Thank you very much!

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple 27" iMac models 2012 & Later. Customer Videos:

    Verified Buyer
    Reviewer: Lerch
    Rating: 4/5 Great experience! May 13, 2018 Great product, support videos and instructions. Thanks for making a complicated process simple!

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple 27" iMac models 2012 & Later. Customer Videos:

    Verified Buyer
    Reviewer: Ibulia Location: Michigan Age: Over 65 Experience Level: Home User Owned Product: over 6 months
    Rating: 5/5 Resurrected 2009 iMac 27” May 11, 2018 My old iMac died 2 years ago. I took it 60 miles to the apple store where I was told they couldn’t do anything for me. So I ordered a new hard drive that appeared to be the same as the original. It didn’t work. So I ordered a new one and a temperature kit from OWC. My original disk that came with the computer would not load. It took me about a month, but I finally got the thing to load from a brand new copy of Snow Leopard. Now I’ve updated to El Capitan and trying to decide whether to go to Sierra or High Sierra. It’s like having a brand new $2000 iMac, interacting with our other iDevices in ways we hadn’t even thought of back in 2009. What a nice surprise!!

    I would recommend this item to a friend! This review is from OWC HDD Compatibility for Apple late 2009 to mid 2010 iMac 21.5" and 27" Models with SMC Compatibility.. Customer Videos:

    Verified Buyer
    Reviewer: iMacSSD Location: Salt Lake City, Utah Age: 25-34 Experience Level: Power User Owned Product: 3-4 months
    Rating: 5/5 Great to order! May 2, 2018 I love how easy OWC makes it to order this part. I always need one and it ships quickly.

    This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple 27" iMac models 2012 & Later. Customer Videos:

    Verified Buyer
    Reviewer: Alvin Location: California Age: 55-65 Experience Level: Power User Owned Product: less than a month
    Rating: 5/5 Just Right! April 26, 2018 Just right for upgrading an old iMac with an SSD. This kit and the great OWC video are wonderful

    I would recommend this item to a friend! This review is from OWC HDD Compatibility for all Apple 2011 iMac 21.5" and 27" Models with SMC Compatibility.. Customer Videos:

    Verified Buyer
    Reviewer: Dawn Location: Macomb, IL Age: 45-54 Experience Level: Power User Owned Product: over 6 months
    Rating: 5/5 Great Customer Service-Great Products April 24, 2018 Ordered a replacement part for our computer....got it quick and at a great price!

    I would recommend this item to a friend! This review is from OWC HDD Compatibility for all Apple 2011 iMac 21.5" and 27" Models with SMC Compatibility.. Customer Videos:

    Verified Buyer
    Reviewer: PapaEd Location: Palm Coast, FL Age: Over 65 Experience Level: IT Professional Owned Product: 1-3 months
    Rating: 5/5 Excellent for upgrading your iMac April 19, 2018 Low cost, easy to use kit with simple-to-follow instructions on their video. Only took about 30 minutes to upgrade to an SSD drive.

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple Late 2009-2010 iMac 21.5", 27". Customer Videos:

    Verified Buyer
    Reviewer: ArielZTD
    Rating: 5/5 Fixed loud/high running fan April 18, 2018 I would recommend this item to a friend! This review is from OWC HDD Compatibility for all Apple 2011 iMac 21.5" and 27" Models with SMC Compatibility.. Customer Videos:
    Verified Buyer Top 100 Contributor
    Reviewer: Andy6456 Location: Oswego, NY Age: 45-54 Experience Level: Home User Owned Product: over 6 months
    Rating: 5/5 The kit U need! April 15, 2018 I recently bought a new/used iMac from OWC and needed the Installation Tool Kit to get into and seal it back up after I upgraded the HDD with an SSD that I previously bought over 6 months ago. This kit makes doing the upgrades easy and anyone can really do them. The kits include quality tools to get the job done fast and accurately.

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple 27" iMac models 2012 & Later. Customer Videos:

    Verified Buyer
    Reviewer: ORF2018 Experience Level: Home User Owned Product: less than a month
    Rating: 5/5 Great Products and Service April 5, 2018 This kit has worked great for me to be able to change out the Hard Drive on my Mid 2011 iMac. Everything of of good quality and did exactly what they needed to do. These tools with the great instructions let me get this change out done in just over 30 minutes.

    This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple 2011 iMac 21.5" and 27" Models. Customer Videos:

    Verified Buyer
    Reviewer: Scot Location: Florida Age: Over 65 Experience Level: Power User Owned Product: over 6 months
    Rating: 5/5 Easy in. March 19, 2018 OWC product provided all items necessary to switch from HHD to solid state drive (SSD)

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple 2011 iMac 21.5" and 27" Models. Customer Videos:

    Verified Buyer
    Reviewer: Ando Location: Auckland, New Zealand Age: 35-44 Experience Level: Power User Owned Product: less than a month
    Rating: 5/5 Works like magic... March 8, 2018 This product literally saved me thousands. My Mid-2010 iMac's HDD finally died after 7.5 years of use but the rest of the system was fine. This cable, paired with a Seagate Firecuda HDD has brought the system back to life and even faster than before. Easy install when following the MacSales instructional video. (About 40 mins all up for me including dust removal from the accessible fans, motherboard etc.) Thanks team - a lifesaver!

    I would recommend this item to a friend! This review is from OWC HDD Compatibility for Apple late 2009 to mid 2010 iMac 21.5" and 27" Models with SMC Compatibility.. Customer Videos:

    Verified Buyer
    Reviewer: Mrmaconly Location: Sacramento, CA Age: Over 65 Experience Level: IT Professional Owned Product: less than a month
    Rating: 5/5 Great accessory February 25, 2018 Have used many of these devices. Stopped using the software fixes. Now when upgrading my customer's iMac drive, I always order one of these.

    I would recommend this item to a friend! This review is from OWC HDD Compatibility for all Apple 2011 iMac 21.5" and 27" Models with SMC Compatibility.. Customer Videos:

    Verified Buyer
    Reviewer: Vicensj Location: PR Age: 45-54 Experience Level: Home User Owned Product: 1-3 months
    Rating: 5/5 Excellent! February 11, 2018 I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple Late 2009-2010 iMac 21.5", 27". Customer Videos:
    Verified Buyer
    Reviewer: macmlover Age: Over 65 Experience Level: Home User Owned Product: 3-4 months
    Rating: 5/5 LCD Display Cable February 4, 2018 It worked like it should. It made my upgrade to SSD work perfectly.

    I would recommend this item to a friend! This review is from OWC HDD Compatibility for Apple late 2009 to mid 2010 iMac 21.5" and 27" Models with SMC Compatibility.. Customer Videos:

    Verified Buyer
    Reviewer: iShenom Location: Salt Lake City, UT Age: 35-44 Experience Level: IT Professional Owned Product: 1-3 months
    Rating: 5/5 This kit worked like a charm! January 9, 2018 I was replacing a hard drive in a 2013 iMac for the first time. This kit made the process pretty straight forward. It has everything you need to dismantle, connect a new drive, and assemble the iMac again.

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple 27" iMac models 2012 & Later. Customer Videos:

    Verified Buyer
    Reviewer: Traumatic911 Location: Albuquerque, NM Age: 35-44 Experience Level: Power User Owned Product: over 6 months
    Rating: 5/5 So far so good January 7, 2018 So far so good, it's working as designed. Hopefully it doesn't fail in the near future!

    I would recommend this item to a friend! This review is from OWC HDD Compatibility for Apple late 2009 to mid 2010 iMac 21.5" and 27" Models with SMC Compatibility.. Customer Videos:

    Verified Buyer Top 250 Contributor
    Reviewer: Emerald
    Rating: 5/5 2010 iMac Upgrade January 4, 2018 With these tools and the instructions from the OWC DIY videos I was able to replace my original hard drive and SuperDrive with SSD's. Mission accomplished. Everything is working great.

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple Late 2009-2010 iMac 21.5", 27". Customer Videos:

    Verified Buyer
    Reviewer: shawnPDX Location: Portland, OR Age: 45-54 Experience Level: IT Professional Owned Product: less than a month
    Rating: 5/5 Worked Perfectly January 2, 2018 Using the iMac HDD upgrade kit was straightforward and easy using the included tools and the online video instructions. I replaced my defective HD in the 2011 iMac and am now back in business!

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple 2011 iMac 21.5" and 27" Models. Customer Videos:

    Verified Buyer
    Reviewer: Watuse Location: Spain Age: 45-54 Experience Level: Home User Owned Product: over 6 months
    Rating: 5/5 Great upgrade package December 27, 2017 I bought this upgrade my hard rice and put in a Samsung SSD which gave new meaning and life to my iMac

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple Late 2009-2010 iMac 21.5", 27". Customer Videos:

    Verified Buyer
    Reviewer: Coldfoot Location: Gig Harbor, Wa Age: Over 65 Experience Level: Home User Owned Product: over 6 months
    Rating: 5/5 Perfect December 24, 2017 I wanted to replace the original HD on my wife's IMAC 27" . I watched the MacSales video probably twenty times so that I would get real familiar with the procedure. I had already replaced HDs on 2 MacBook pros so I wasn't worried about cloning the SSD for the IMAC. I ordered the complete kit and the SSD bracket as well. I cloned the internal HD with my Samsung 850Pro 1TB using my usb to Sata drive connector. I then began taking the IMAC apart with the supplied tools while rematching the Video on the Macbook next to me. Everything went perfect. The hardest part is making sure to align the adhesive strips one at time. Make sure you DO NOT take both sides off at the same time. Slow and methodical and make sure the bottom is perfectly aligned before closing. Be sure to connect the connectors before closing. I would suggest having someone help you at this point as I had to use my iPhone to hold the screen up while I replaced the connectors and then lowered the screen onto the adhesive strips... Looks great and is perfectly aligned. Interesting that the Samsung SSD still takes a little time before the apple logo appears but then the load is quick. My 2 MacBooks immediately go to Apple logo and then open more quickly. The IMac 27" though once loaded does perform so much better than the original drive...

    I would recommend this item to a friend! This review is from OWC HDD Installation tools & SMC Compatibility Solution for all Apple 27" iMac models 2012 & Later. Customer Videos:

    Verified Buyer Top 100 Contributor
    Reviewer: FultonKBD Location: Akron, OH Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
    Rating: 5/5 Works as advertised December 23, 2017 Customer Videos:
    OWC In-line Digital Thermal Sensor for Hard Drive Upgrade for 27" Apple iMac 2012 and later Models Mfr P/N: DIDIMACHDD12 OWC SKU: OWCDIDIMACHDD12 OWC DIY Kit for all Apple 27" iMac 2012 and later Models for replacing the main hard drive. Includes all cables necessary for installation. Hard drive and tools sold separately. 1 Year OWC Limited Warranty Ships: Same Day Only $49.99OWC Price $39.99
    Add to CartOther World Computing DIDIMACHDD12 In Stock, Click to Buy Now
    Available iMac Kits: 2009-2010 (21.5" & 27") 2011 (21.5" & 27") 2012+ (27" Only)