Name: OWC Complete Hard Drive Upgrade Kit for 27" iMac (Late 2012 - Mid 2019)
Brand: OWC
SKU: OWCDIYIMACHDD12
Price: 47.75 USD
Availability: InStock
Rating: 4.81 (73 reviews)

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.

Already have all the tools necessary to perform this upgrade?

You can purchase the sensor cable set separately here.

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
Compatibility
VIDEO
RATINGS

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 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

Detailed specs

Install Videos

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

Detailed specs

Install Videos

iMac w/Retina 5K display
(27-inch Late 2015)

(October 2015)

Model ID:iMac17,1

3.2GHz i5, 3.3GHz i5, 4.0GHz i7

Detailed specs

Install Videos

iMac w/Retina 5K display
(27-inch Mid 2015)

(May 2015)

Model ID: iMac15,1

3.3GHz i5, 3.5GHz i5, 4.0GHz i7

Detailed specs

Install Videos

iMac with Retina 5K display (27-inch Late 2014)

(October 2014)

Model ID: iMac15,1

3.5GHz i5, 4.0GHz i7

Detailed specs

Install Videos

iMac (27-inch Late 2013)

(September, 2013)

Model ID: iMac14,2

3.2GHz i5, 3.4GHz i5, 3.5GHz i7

Detailed specs

Install Videos

iMac (27-inch Late 2012)

(November, 2012)

Model ID: iMac13,2

2.9GHz i5, 3.2GHz i5, 3.4GHz i7

Detailed specs

Install Videos

Install Video

Professional installation is highly recommended.

Customer Ratings

Write a Review 4.8 / 5 71 out of 73 (97%) reviewers would recommend this product

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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). Customer Videos:

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). Customer Videos:

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). Customer Videos:

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). Customer Videos:

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). Customer Videos:

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). Customer Videos:

Verified Buyer

Reviewer: Geier71 Location: Minneapolis, MN Age: 45-54 Experience Level: Power User Owned Product: over 6 months

Rating: 5/5 it just worked July 3, 2020 I purchase this to upgrade to an SSD. everything i needed was in the kit. with the online videos i was able to know what i was getting into. this was the perfect kit!

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). Customer Videos:

Verified Buyer

Reviewer: Jazzguitar Location: Boston, MA Age: 35-44 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 Amazing! May 4, 2020 I had been booting from a SSD in a USB enclosure and finally decided to take the plunge and try an internal installation. I researched and found this kit, the only thing that I forgot to get was the SSD bracket adapter, but that's entirely my own fault. I watched the video carefully and prepared for the worst but was pleasantly surprised at how easy it was to do, especially since I had all the right tools. Installation took under 30 minutes and now my Late 2013 iMac is better than new. If I had know it was this easy I would have done it years ago!

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

Verified Buyer

Reviewer: Tweakypuppy

Rating: 5/5 Exactly as described April 17, 2020 Replaced my main drive with an SSD using this kit. Easy to follow instructions provided thru the website, every tool you need is included in the kit.. excellent product.

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

Verified Buyer

Reviewer: misterJosel Location: Los Angeles, CA Experience Level: Power User Owned Product: less than a month

Rating: 5/5 Works flawlessly, get angled tweezers to install. January 23, 2020 I bought the sensor cable to upgrade my iMac to an SSD. I couldn't pull out the sensor connector per the instruction video, but using a pair of angled tweezers helped me easily unplug the tiny T-shaped thermal sensor connectors without fear of tearing off a cable. Works great!

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). Customer Videos:

Verified Buyer

Reviewer: bai8899

Rating: 5/5 good August 22, 2019 I would recommend this item to a friend! Customer Videos:

Verified Buyer

Reviewer: Corriglionni Location: Eureka, CA Age: 45-54 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 Easier than I expected. June 18, 2019 The kit contained everything I needed to upgraded my 27 iMac hard drive from the 1TB it shipped with to a faster 4TB with a larger cache. The video that shows the steps made me confident that I could install the drive myself. Sealed everything back up tight and it's running great.

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

Reviewer: georgedonathan Location: Georgia Age: 55-65 Experience Level: IT Professional Owned Product: less than a month

Rating: 5/5 Save my iMac May 25, 2019 I have 2 iMac 27 and the fan started staying on for long periods of times. I now know that it was affecting my hard drive. Anyway, after installing a new WD 1TB hard drive and this thermal kit, I no longer hear the fan much at all, even after 14 straight hours of installs, updated, etc.

I will buy another Wd and thermo kit next month to put in my other iMac 27. Best purchase for my iMac since purchase, previously it was the covers.

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

Verified Buyer

Reviewer: PatF Location: E WA Age: Over 65 Experience Level: IT Professional Owned Product: less than a month

Rating: 5/5 Works great. January 5, 2019 After upgrading to an SSD, I tried the software "solution" for temperature control but found it unreliable. This was defitnitely worth the time and money. Thanks again, OWC.

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

Verified Buyer

Reviewer: MikeinPA Location: Philadelphia, PA Age: 45-54 Experience Level: Power User Owned Product: 1-3 months

Rating: 5/5 Delicate but works great November 15, 2018 It's a delicate install. Getting the wires unplugged in the first place is not bad, but two of them are pretty delicate and awkwardly placed and a little tough to replace. I had the screen off and hard drive replaced in 20 minutes. It took at least another 20 to get the connectors re-connected. A.) I have huge fat fingers and B.) Horrible eyesight, so that could be a big part and it's certainly no knock on the product. The video is perfect and I knew what I had to do. It was simply a matter of doing it. In short, the video is perfect and the product is exactly what you need (check your model). Once re-assembled I now have a 100% functioning iMac again and now with a huge 6TB hard drive.

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). Customer Videos:

Verified Buyer

Reviewer: Viktor Location: Tallinn, Estonia Age: 25-34 Experience Level: IT Professional Owned Product: less than a month

Rating: 5/5 It simply works October 21, 2018 It does the job very well. Good price and packaging.

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

Verified Buyer

Reviewer: Mike89 Location: Connecticut Age: 25-34 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 Perfect! October 3, 2018 I wasn't aware when I installed a SSD in my 2011 iMac that I would need an ad-on temp sensor.. It wasn't long after hearing my fan running at full speed and thinking, hmm that's strange that led me to this product. Pulled it back apart and installed in about an hour, super easy. First time obviously took longer to get the drive out and swapped because I was following instructions, but second time was a breeze. Once back together I removed the manual fan control that I had used in the meantime and the fans are running as they were with the factory drive installed. Great product!

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

Verified Buyer

Reviewer: boastboy Age: 45-54 Experience Level: Power User Owned Product: 1-3 months

Rating: 5/5 OWC... helping people fix their own Macs for 30 years! September 9, 2018 I bought a second hand 2011 iMac for a song and really wanted to boost the speed, so I bought an SSD, glad I read about the temp sensor somewhere. Anyway, really easy to install! OWC really makes it easy with their step by step guides.

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

Verified Buyer

Reviewer: jeancass Location: coosbay oregon Age: 55-65 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Perfect for the job! September 7, 2018 I recently used this tool kit to replace the hard drive in my 2011 iMac. I got this kit, the hard drive, & SoftRaid (to certify the disk & clone before installing) and it all went smoothly. And THANK YOU OWC for having such great installation videos!

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

Verified Buyer

Reviewer: OnlineConsumer Location: Central Florida Age: Over 65 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Best solution to replace IMac drive with SSD September 2, 2018 I swapped my hard drive in my Mid 2011 IMac to an SSD drive. I had three options to have an internal SSD drive. 1) Replace the CD/ROM with an SSD drive since it is a SATA drive. I chose not to because the CD/ROM SATA is slower than the other two SATA ports. 2) Add an additional drive behind the CD/ROM using the unused SATA port. I almost did this option but required more disassembly of the IMac to get to the SATA port and I did not need the extra disk space. I also prefer all on one disk drive/partition. 3) Replace the existing drive. The existing hard drive only runs at half the rated speed of the SATA port. This is the option I selected as the SSD will run at the full SATA speed.

Ordered this cable kit and the Adaptadrive to install a 2.5 inch drive in the IMac. I used a 500GB SSD drive from another source. The install videos were a great help. Used Time Machine to make sure both of my TM back-ups were up to date. I already had a boot USB thumb drive. The only issue I had was my mistake where I bent the LCD cable pins when reattaching the display. I had to order a new LCD cable which delayed my install by two days. Nice that the part number was printed on the LCD cable. When I installed the new LCD cable I laid the open IMac face up on a bed and instead on hinging the display from bottom as the video shows, I hinged it from the top which made putting the LCD cable from the bottom easier and allowed a straight alignment. Then repositioned the display to bottom hinge to attach the other three cables in. If I was to do it again, I would try laying the IMac face up, just hinge the display up from the bottom without removing the four screen cables and use a stubby T10 driver to remove and replace the disk drive as there appears to be enough room. I used my USB boot thumb drive to boot the IMac and Time Machine to transfer my data to the new SSD drive. The transfer of all my data to the SDD took several hours. When I started photos, it had to do its thing which took a hour or so. Everything is now the same as before the SSD install except it is faster. The only System Preference change I made was to change the Energy Saver option to uncheck the "put hard disk to sleep when possible". The SSD I got does its housekeeping (called active garbage collection on my SSD) during idle time and since it has that feature I did not set the TRIM option as it is not needed. I am happy with the results as the computer is much faster loading programs and anything that uses the disk. I did not have any fan control issues that others have when using other solutions. Yes, I would do it again.

This review is from OWC Complete Hard Drive Upgrade Kit for 27" & 21.5" iMac (2011). Customer Videos:

Verified Buyer

Reviewer: LoveToTinker Location: San Diego, CA Age: Over 65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 A perfect solution for an old computer August 30, 2018 My hard drive died in my old iMac. I had no idea how to open the iMac or how to replace the drive. An internet search took me to an OWC video that showed the process. I went to the macsales website and was able to get everything i needed to do the repair, including a new hard drive. I chatted with someone there. I provided the serial number of my computer to the person. He assured me that the items I had put in my cart were correct. I made my purchase and much to my amazement everything arrived the next day. I rewatched the video and in 20 minutes my computer was working again. I am happy that I found this website, everything was easy and now I have a working computer again.

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

Verified Buyer

Reviewer: Gnemik Location: NYC Age: 55-65 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 Fantastic August 23, 2018 Undertaking the task of replacing a damanged HD, part of an Apple Fusion drive, in an iMac 27: Late 2013 can be daunting, intimidating However, due diligence and numerous google searches and youtube examples, one is constantly directed to OWC for their noted Installation Kit, which includes the necessary thermal sensor. I think there are a few essential requisites to replace the HD, in this iMac. First, you cannot view enough video tutorials/instructions for this tech journey. Second, get quality tools and parts. You want to be able to do it right the first time. Third, Patience. Don't rush, go back and look at videos again, look at pictures to get a clear idea of what you're doing. Zoom in. Fourth, be smart and plan ahead. Make room to do the job. Have a safe place to put your LCD/glass. Some additional things I used, that I felt greatly helped: Gloves (surgical type, nice fit and negates most of risk of ruining circuit boards, capacitors, etcO. A mini flashlight, came in handy when lifting the glass and peering to see the 2 connectors that had to be handled. I also stuck some styrofoam between the imac and the stand, to keep that spaced. Also, I used a styrogoam piece to raise the iMac off the table when i put it on it's back, to work on removing the glass/lcd and during the hard drive replacement. My opinion, the job is immensely easier using OWC installation kit, and watching OWC video instruction video. Each item included in the kit is useful. Another hint: when using the 'roller' to separae the glass, I suggest you do a shallow pass first, do this for both sides and the top. Then work it deeped along the side and corner...and then the top. Be patient, insert plastic cards (spare credit cards? or the like) and gradually you'll feel the separation. Another tip: if you have access to another mac, format the replacement drive and install osx. This way, after you install the imac will boot right into the drive and begin setup process. THANKS OWC. Only did this repair because of your reputation and tools.

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

Verified Buyer

Reviewer: DocBruce Age: 55-65 Experience Level: Power User Owned Product: over 6 months

Rating: 5/5 A kit of tools that simplify the upgrade August 16, 2018 I needed to replace a hard drive on a heavily used office iMac due to disk read errors when cloning the drive. At the same time, I installed a solid state drive. The only other item needed was a specialty SAT cable between mother board and drive. The install required a few hours but the iMac is better than new. Copying information from the internal hard drive to the SSD (approximately 90 Gig data and applications) required only about 20 minutes instead of the much slower speed of a USB transfer.

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

Verified Buyer

Reviewer: TotalMac Location: Quebec, Canada Age: 35-44 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 The solution for iMac upgrade! August 13, 2018 Received very quickly the package containing all the tools including the thermal probe. With the help of the videos and tutorials available on Youtube, I managed to proceed and the results are great. I appreciate the good quality of the tools and the excellent packaging to deliver it. The result is a very clean installation (note that I had to buy an adaptor to fit the SSD into place). Now this iMac will continue to work like a charm for many years, at a fraction of the price for a new computer!

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). Customer Videos:

Verified Buyer

Reviewer: DavidGWilson Location: Wellington, New Zealand Age: 45-54 Experience Level: Power User Owned Product: 1-3 months

Rating: 5/5 Saved again - brilliant August 10, 2018 This in-line solution that allows normal hard drives (thats drives without Apple Firmware) to be used on Macs is brilliant. So easy to install as well.

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

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