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OWC DIY Complete Hard Drive Upgrade Kit for 27-inch iMac (Late 2012 - Mid 2019)

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In stock at Macfixit: Yes

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Shipping cost is $9.90 (flat rate) for any size order.
This product is covered by an Australian Replacement Warranty.
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Product code: OWCDIYIMACHDD12

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OWC Complete HDD Upgrade Kit with Tools & in-line OWC Digital Thermal for all Apple iMac 27" Models 2012 & Later. Upgrade your iMac w/the 3.5" SATA Hard Drive of your choosing. No Software hacks, AHT Diagnostic compatible. Hard drive sold separately.

Regular price: $109.99

Savings: $10.00

Your price: $99.99

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OWC Complete Hard Drive Upgrade Kit Including Tools for all 27" iMacs 2012 & Later

Already have all the tools necessary to perform this upgrade?
You can purchase the sensor cable set separately

Kit with installation tools and OWC In-line Digital Thermal Sensor for all Apple iMac 2012 and later models allows the use of any 3.5" Serial ATA hard drive to be used in your iMac while maintaining proper system fan speed control via Apple's built-in SMC with no software hacks. Fully compatible with Apple diagnostic testing. 27" iMac models utilize 3.5" Hard Drives. 
  • 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.
Are you close to maxing out your factory-original hard drive? With the OWC Internal HDD DIY Kit, you can replace the original hard drive in your 27" iMac with a hard drive up to 4.0TB (sold separately) for up to 8x more storage capacity!

Unlike some other drive upgrade options for 2011 iMac models, this OWC DIY kit is certified to successfully pass the Apple Hardware Test. This means the newly installed hard drive will work with Apple's built-in diagnostic process, preserving proper system fan speed control. 

Note: Before attempting to perform this installation, please watch the OWC Install Video in its entirety 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.


    • (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 not covered by any warranty. 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...Click here 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


Additional Information

Colour No
Type No
Form Factor No
Suitable for iMac
Model Identifier iMac13,2, iMac14,2, iMac15,1, iMac17,1
Manufacturer OWC
Manufacturer P/N OWCDIYIMACHDD12
UPC 794504334753
Link to Manual No
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Shipping cost is $9.90 (flat rate) for any size order. Express Options are available in cart/checkout. All in-stock orders are shipped the same day if received by 10.30 AM (Eastern Time Victoria). Orders received after 11:00 AM are shipped the following business day.

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