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OWC In-line Digital Thermal Sensor for iMac 2011 Hard Drive Upgrade
  • Required for any drive installed into the main drive bay.
  • Eliminate fan noise and maintain correct system fan control when upgrading your 2011 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.

    Note: Before attempting to perform this installation, please watch the OWC Install Videos below to determine your ability to perform this complex upgrade.

    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 2009–2010 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.

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

    Includes


    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 (21.5-inch Late 2011)
    (August, 2011)
    Model ID: iMac12,1
    3.1GHz i3
    iMac Intel
    iMac (21.5-inch Mid 2011)
    (May, 2011)
    Model ID: iMac12,1
    2.5GHz i5, 2.7GHz i5, 2.8GHz i7
    iMac Intel
    iMac (27-inch Mid 2011)
    (May, 2011)
    Model ID: iMac12,2
    2.7GHz i5, 3.1GHz i5, 3.4GHz i7

    Gallery

    Customer Ratings

    Write a Review 4.9 / 5 37 out of 37 (100%) reviewers would recommend this product
    1 2 3 4
    Verified Buyer
    Reviewer: flatlander
    Rating: 5/5 Great product January 19, 2017 Thermal sensor adapter cable works great. Install video is very helpful. Be sure to get the correct cable for your year of imac. With the solid state drive the 7 year old imac boots in 20 seconds.

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

    Verified Buyer
    Reviewer: lowerground Age: 45-54 Experience Level: IT Professional
    Rating: 5/5 Great Product!!! January 19, 2017 Serves its purpose. Awesome product!

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

    Verified Buyer
    Reviewer: trentfox Location: Peterborough, Ontario Age: Over 65 Experience Level: Power User Owned Product: less than a month
    Rating: 5/5 Clever adaptation January 4, 2017 Product was easy to install, and works as advertised. While one can use software to control the hard drive fan speed (and noise!), it was worth $35 to me to have the fan sensor working as it should after replacing the hard drive in a 27" 2010 iMac with an SSD. Incidentally, this was a stupid design decision by Apple to use a drive-specific sensor cable. Fortunately they only did this for one or two years because my 2009 and 2012 iMac models didn't have this.

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

    Verified Buyer
    Reviewer: 4466
    Rating: 5/5 Recommended December 31, 2016 This product provides a simple way to upgrade or replace the hard drive in a 2009 iMac with a non-Apple unit that compensates for the lack of temperature sensor functionality. You don't need to download any fan control software. With the excellent on-line videos, installation of a new SSD was straight-forward. So far, so good!

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

    Verified Buyer
    Reviewer: Kisser Location: Sussex County Age: 55-65 Experience Level: Power User Owned Product: 3-4 months
    Rating: 5/5 Great Product December 11, 2016 This review is from OWC HDD Compatibility for all Apple 2009-2010 iMac 21.5" and 27" Models with SMC Compatibility.. Customer Videos:
    Verified Buyer
    Reviewer: eholtam Age: 35-44 Experience Level: IT Professional Owned Product: less than a month
    Rating: 5/5 The missing piece December 6, 2016 Apple's iMac HDD firmware has a proprietary component that allows it to communicate environmental temperatures back to keep the fans at an acceptable rate. If you try and replace a drive without that communication the system assumes the worst (FIRE!) and kicks those fans on high forever. This adapter is the missing piece to allow outdated machines to reap the rewards of modern SSD technology.

    The installation went as expected. Even my bear-like manhands were able to remove the iMac screen and detach the cables as necessary. Thanks to the handy video installation guide I was prepared for those gotchas.

    I already recommended (and helped install) this setup to a friend. I recommend it to you, too.

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

    Verified Buyer
    Reviewer: Guymer Location: TX Age: 55-65 Experience Level: Home User Owned Product: less than a month
    Rating: 5/5 Keeps it quiet December 6, 2016 This is meant to replace temp sensor of the iMac for non mac drives. That it is designed for this instead of just a hack is a marvelous thing.

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

    Verified Buyer
    Reviewer: Penrod Location: Iowa Park, TX Age: 25-34 Experience Level: Home User Owned Product: 1-3 months
    Rating: 5/5 Installed but wasn't required December 4, 2016 I got this because the site said that the hard drive I bought needed this, but it has the same exact connection as my last hard drive so I'm pretty sure this wasn't required. I installed it anyways since I didn't want to send it back and it seems to be working great.

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

    Verified Buyer
    Reviewer: djaipii Location: LYON - FRANCE Age: 55-65 Experience Level: Home User Owned Product: over 6 months
    Rating: 5/5 HHD Replacement With SSHD November 30, 2016 I only needed the t° sensor from you guys and the supply was easy quick and well done But what I want to say, is beyond all, I LOVE YOUR VIDEO TUTORIALS and the musical tune , thanks

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

    Verified Buyer
    Reviewer: Giampo Location: Rome, Italy Age: 35-44 Experience Level: Power User Owned Product: less than a month
    Rating: 5/5 Excellent November 28, 2016 I bought the HDD compatibility cable when I decided to replace my old 500GB HDD with a newer 750 GB SDD. When I did the installation, the cable worked and is working just fine. The termal sensor is in order since the main fan of my iMAC is not over working. Also, the shipment of the item was smooth and fine.

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

    Verified Buyer
    Reviewer: Peppersoft Location: Switzerland Age: 55-65 Experience Level: IT Professional Owned Product: less than a month
    Rating: 5/5 Easy to install, works perfectly :-) November 22, 2016 After upgrading my iMac with a SSD the fan always ran at full speed while booting or using bootcamp. Now: perfect silence as required in a music studio. PERFECT!! Thank you OWC :-)

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

    Verified Buyer
    Reviewer: Moni
    Rating: 5/5 Works Great! November 17, 2016 Computer fan is smooth & quiet after replacing my hard drive as promised. Actually sounds smoother then before. Thanks!

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

    Verified Buyer
    Reviewer: Jorgen
    Rating: 5/5 Works like à charm! November 8, 2016 Installerad it in my late 2015 iMac. Now I run two separate disks. One 3,5". 3TB WD red and the built in SSD drive. Perfect if you want to replace standard drive or install a SSD

    Please note: For dual drives more parts needed.

    I would recommend this item to a friend! This review is from OWC HDD Compatibility for all Apple iMac 27" models 2012 and Later - digital sensor for SMC. Customer Videos:

    Verified Buyer
    Reviewer: Satir8 Age: 35-44
    Rating: 5/5 Easy to install, it does the job October 14, 2016 Very easy to install. It works fine on my iMac mid 2010 i7 quad core. Usefull if, like me, you don't want to install a software to control the hd fan.

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

    Verified Buyer
    Reviewer: UsedMac Location: Akron, OH Age: 45-54 Experience Level: IT Professional Owned Product: less than a month
    Rating: 5/5 Exactly What I Needed October 7, 2016 Replacing the internal hard drive on 2009 and later iMacs has been torture until OWC came up with this product. No more thermal problems from a simple upgrade. 100% recommend

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

    Verified Buyer
    Reviewer: doctrsnoop Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
    Rating: 5/5 Necessity for HD upgrade for 09/10 iMac HD upgrade October 2, 2016 If you need or want to upgrade the Hd that comes with an 09 or 10 iMac, you want this to make it work correctly. Easy to install, works as described.

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

    Verified Buyer
    Reviewer: agrajag Location: Canada Age: 45-54 Experience Level: Power User
    Rating: 4/5 Did the trick- like new iMac September 3, 2016 27" iMac 2011 with a dead HD (Seagate) now resurrected with an SSD, working nicely using this module. Also used the OWC adapter so the SSD fit in the iMac HD mount.

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

    Verified Buyer
    Reviewer: nekton Location: Japan Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months
    Rating: 4/5 It does the job August 25, 2016 This little gizmo does the job of replacing the thermal sensing firmware in HDDs when replacing the HDD with an SSD. Although there is a workaround in software, this hardware solution is more reliable and leaves the system "cleaner" with fewer third-party fixes. My only "quibble" (and it is a small one), is that the overseas handling and shipping nearly doubled the price, so it is an expensive solution relative to the software workaround. Such a little part should be shipped for pennies in a regular airmail envelope.

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

    Verified Buyer
    Reviewer: UncleDean Location: Boston, MA Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months
    Rating: 5/5 Piece of cake to install August 16, 2016 For my 2012 vintage iMac, swapping out the old magnetic drive with an SSD was pretty easy. It took me about 2 hours, but I'm slow. About 1 hour was spent vacuuming out a 4 year accumulation of lint and dust that had found its way into the iMac! Think Mr. Monk, IT guy.

    The only tricky part is being careful removing the connectors that attach the iMac screen to the machine itself. I watched several YouTube videos to get a better idea of how to release the various connectors. Some have "ears" on the side that need to be squeezed, etc. Just don't force a connector apart! Take your time.

    The other thing I found that worked well for me was removing the screen from the iMac while leaving the iMac standing on a desktop. Once I had the 8 screws removed which secure the screen, I was able to gently tilt the top of the screen out from the iMac body and rest the top edge of the screen on my chest. This let me use both my hands to then disconnect each of the 4 wire connectors attached to the screen.

    With the screen removed, swapping out the old hard drive itself was a piece of cake. The improvement in speed with the SSD makes it almost as fast as a new iMac, but for about 1/100 the price!

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

    Verified Buyer
    Reviewer: Larry767 Location: Humboldt, SK Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
    Rating: 5/5 Exactly as advertised. August 12, 2016 I had no issues with this. Worked exactly as described in a 2010 iMac.

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

    Verified Buyer
    Reviewer: LVCustomer Location: Latvia Age: 25-34 Experience Level: IT Professional Owned Product: less than a month
    Rating: 5/5 Amazing fast delivery August 9, 2016 I have never got items from US so quick using non-expres delivery.

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

    Verified Buyer
    Reviewer: Anonymous Location: Newcastle, Australia Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
    Rating: 5/5 Does what it says on the tin August 4, 2016 This solution works as advertised; I have had it installed for at least one month and it has performed without any issues. Installation was as per the video provided, which I found to be complete, giving clear instructions. I had reason to install my new HDD prior to receiving this thermal controller, so I can say from experience that the cooling fans will ramp up to full speed for significant periods of time (quite annoying; yet prudent of the Apple engineers) without the feedback from this thermal controller; which provides a clever solution. Just one minor points to note: make sure that you choose a location on your HDD which will not interfere with the back of the display panel (easy). Cheers

    I would recommend this item to a friend!

    Verified Buyer Top 100 Contributor
    Reviewer: Anonymous Location: northern CO Age: Over 65 Experience Level: Home User Owned Product: over 6 months
    Rating: 5/5 thermal sensor needed for SSD install in IMAC August 1, 2016 This works well for the SSD I installed in my IMAC

    I would recommend this item to a friend!

    Verified Buyer
    Reviewer: Anonymous Location: Maryland Age: 45-54 Experience Level: IT Professional Owned Product: less than a month
    Rating: 5/5 Worked fine July 26, 2016 Installed new hard drive with this thermal sensor and it worked fine. Seemed a lot easier than trying to manage fan & temp with software since I wasn't using an official Apple drive.

    I would recommend this item to a friend!

    Verified Buyer
    Reviewer: Anonymous Location: Murfreesboro, TN Age: Over 65 Experience Level: IT Professional Owned Product: 1-3 months
    Rating: 5/5 SSD adapter for iMac 2010... July 24, 2016 Thanks to all at OWC for finding new ways to to help older Macs to keep up with the ever changing tech advances. This device simply plugs in to the drive and power supply. It monitors the heat build up in the drive and controls the cooling fan. Without out this there is nothing to keep the fan from running full out. And it's really loud.

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

    OWC In-line Digital Thermal Sensor for all Apple iMac 2011 Models Mfr P/N: DIDIMACHDD11 MacSales.com SKU: OWCDIDIMACHDD11 OWC DIY Kit for all Apple iMac 2011 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 $49.99MacSales.com Price $39.99
    Add to CartOther World Computing DIDIMACHDD11 In Stock, Click to Buy Now
    Get the correct version: 2009-2010 iMacs
    • Sensor
      • Ships: Same Day
      • Only $49.99
      • MacSales.com Price $39.99
    2011 iMacs
    • Sensor
    2012 and Later iMacs
    • Sensor
      • Ships: Same Day
      • Only $49.99
      • MacSales.com Price $39.99