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DIY Bundle

and HDD Kit for all 2011 iMacs

Mercury Extreme Pro SSD and iMac HDD Kit
Upgrade with Confidence!
The complete solution for your 2011 iMac
Experience the extreme performance of an OWC SSD upgrade with this easy DIY SSD and hard drive replacement kit. Add an SSD to your hard drive equipped iMac to experience faster booting, near instant application launches and lightning fast data transfer speeds.
Starts fast, stays fast
Even though many SSDs use low cost, less robust components in their design, they can still offer enticing short term bust speeds which are perfectly suitable for light duty uses. However, those drives are not designed to deliver consistent sustained speeds over their capacity rating, which results in a dramatic slowdown to even hard drive speeds under demanding use.
The fifth generation of Mercury Extreme Pro 6G SSD was built to start fast and stay fast at over 500MB/s sustained. Its development began with using the best flash storage components and technology available. Next, after being nearly completely filled to capacity with data, it had to deliver the same high speed as if it were empty. This drive doesn’t flinch at any time or capacity level and drop read/write speeds like other drives do…it easily handles the most extreme, mission-critical uses you can throw at it.
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.
Maintains highest performance while offering ultimate convenience
The NewerTech AdaptaDrive has been benchmark test proven to deliver the same data transfer rates as is experienced when a drive is connected directly to the SATA data bus. The AdaptaDrive doesn't create a bottleneck or any performance throttling...it delivers pure data pass-through performance and drive use convenience from any 2.5" SATA 1.5Gb/s, 3Gb/s, or 6Gb/s hard drive or SSD.

Please note, that before attempting to perform this installation, it is recommended you watch the associated instructional video in its entirety to determine your ability to perform this complex procedure. OWC assumes no responsibility for damage that may occur during the install.

Release Candidate (RC) firmware set

There are two kinds of firmware for SSDs Mass Production (MP) and Release Candidate (RC). Prior to an MP firmware release, there are beta firmware releases and an RC firmware release. Often, the RC is the same as the MP release, however there can be small changes and bug fixes made between the two. OWC has evaluated the RC for the 6Gb/s SandForce 2281 Processor and found it to be stable with no issues reported during our testing. However, as with any evolutionary product, issues may surface as different usages and configurations are employed and it is important to understand that there will be further updates and revisions.

Since no firmware update is currently offered for the OWC Mercury EXTREME Pro 6G SSD, no update page exists. To see the typical steps involved with a self performed field firmware update, please visit our 3Gb/s product update page at: http://eshop.macsales.com/Customized_Pages/Framework.cfm?page=sf_firmware.html

It is important to note that the current firmware update tool requires the use of Windows XP/Vista/7. OWC is currently working on a Mac OS based update tool, but we do not have an exact availability date.

960GB Mercury Extreme Pro 6G SSD Specifications:


Phison PS3112-S12 with 7% over-provisioning
Synchronous Triple-Level Cell (TLC) 3D NAND Flash
Form Factor
2.5-inch 7mm
SATA 6.0 Gb/s
960GB useable capacity
Total Flash Memory Components – 1024GB
64GB allocated to real-time data redundancy & error correction
Formatted Capacity
RAID Support
SMART Attributes
Standard attributes supported
Native Command Queuing
up to 32 commands
Manufacturer Model Number
RoHS Compliant


Height (max)
0.7 cm (0.3 in)
OWC 7mm – 9.5mm Adapter
1 included (buy additional)
Width (max)
7.0 cm (2.8 in)
Length (max)
10.0 cm (3.9 in)
77.0 g (0.17 lbs)


Data Reliability
Built-in BCH ECC: Up to 66 bits correctable per 1024 bytes
Nonrecoverable Read Errors
Less than 1 sector per 1016 bits read


Sequential Reads (Max)
Up to 550 MB/s
Sequential Writes (Max)
Up to 530 MB/s
Sequential 4K Read
Up to 100,000 IOPS
Sequential 4K Write
Up to 90,000 IOPS


Write: 2000mW (2.0W) Maximum draw

Environmental (Operating)

-304.8 m to 3,048.0 m (-1,000 ft to 10,000 ft)
Temperature (°F)
32°F to 158°F
Temperature (°C)
0°C to 70°C

Environmental (Non-Operating)

304.8 m to 12,192.0 m (-1,000 ft to 40,000 ft)
Temperature (°F)
-40°F to 185°F
Temperature (°C)
-40°C to 85°C


Idle (Typical)
0.0 bels
Seek (Typical)
0.0 bels
  • 1GB = 1,000,000,000 bytes. Total accessible capacity varies depending upon operating environment (typically 5-10% less). The actual total capacity will depend on your own defined file settings/preferences. 
  • In terms of standard gigabytes, 1GiB ≈ 1.074GB and refers to the actual formatted capacity of shown under Mac OS 10.5 or earlier and Microsoft Windows OS.

AdaptaDrive Specifications:

NewerTech Part Number


Drive Inteface

  • Fully SATA Revision 3.0 (6Gb/s) compatible
  • SATA Revision 2.0 (3Gb/s) and 1.0 (1.5Gb/s) compatible

Drive Supported

  • (1) 2.5" SATA 6Gb/s drive


  • Black painted Aluminum


  • Height: 0.4 in (1.0 cm)
  • Width: 4.0 in (10.2 cm)
  • Length: 5.8 in (14.7 cm)

Weight (Without Drives

  • 3.5 oz (99.2 g)
Manufacturer provided specifications for Other World Computing p/n OWCKITIM11HP1TB UPC#: 812437028898


27" iMac Install Video

21.5" iMac Install Video

This product is compatible with... Learn how to find your Mac's model ID
iMac Intel
iMac (27-inch Mid 2011)
(May 2011)
Model ID: iMac12,2
2.7GHz i5, 3.1GHz i5, 3.4GHz i7
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


  • (1) OWC Mercury Extreme Pro 6G SSD
  • (1) AdaptaDrive 2.5" to 3.5" Drive Converter Bracket
  • (1) OWC In-line Digital Thermal Sensor Cable
  • (2) OWC 2-1/4" Suction Cup
  • (1) Torx T10 driver
  • (1) Torx T8 driver
  • (1) Nylon Pry Tool (Spudger)
  • (1) OWC Blue Microfiber Screen Cleaning Cloth

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.


The best warranty is one you never have to use - but should the need occur - we're proud to provide a superior level of support and service coverage to our customers.

5 Year OWC SSD Limited Warranty on the OWC Mercury Extreme Pro 6G SSD

1 Year OWC Brand Standard Limited Warranty on the OWC In-line Thermal Sensor cable

5 Year NewerTech Product Limited Warranty on the NewerTech AdaptaDrive

Even when not used, we understand the peace of mind afforded by a longer warranty period. OWC's industry leading coverage is a testament to our confidence in the reliability of the solutions that we offer. OWC solutions are engineered to demanding quality standards in order to deliver the most reliable, highest performance available on the market in each storage category.

Customer Ratings

Write a Review 4.8 / 5 7 out of 7 (100%) reviewers would recommend this product
Verified Buyer
Reviewer: TommyMac Location: Suburbs of Phila.PA Age: 55-65 Experience Level: IT Professional Owned Product: 3-4 months
Rating: 5/5 Bring New Life to Your Aging Mac ! September 9, 2020 My wife and I both have Mid 2011 Mac's. They were getting a little long in the tooth so to speak , not quite as zippy as the were when new. I have a background in IT with widows PC's and IBM Midrange AS400 systems. So I am somewhat versed on taking them apart , installing upgrades etc. The Mac was a little scary the first time through , so I did mine first so as not to break the wife's computer ! I must say the instructional videos are top notch and the kits have every thing necessary to replace the Hard Drive with an SSD. AMAZING difference in boot times and response times! Well with the time and effort for the minimal expense of this upgrade, The only really tricky part of the install is the flat ribbon video cable, The instructions clear , smaller hands would help. Took two tries to properly seat this cable , so recommend before buttoning up the display, turn the unit on to make sure all your connections are secure. In addition I found in addition to the suggested backup which I used as a fail safe. I found and recommend that you use a USB SATA with the removed hard drive to do the restore, unless you are reinstalling from scratch. All in all I did the upgrade on my MAC on a Friday night in about 3-4 hours with the restore. Ordered the kit for my wife's MAC the next day. It's that good ! OWC's Kits Rock !

I would recommend this item to a friend! This review is from DIY Kit for 2011 iMac's factory HDD: 480GB OWC Mercury Extreme Pro 6G SSD.. Customer Videos:

Verified Buyer
Reviewer: Mark111 Location: England, UK
Rating: 5/5 Perfect!!!! July 4, 2020 My 27” 2011 iMac was running so slowly. Had almost given up on it, when I diagnosed it had to be the old HDD. Upgrade kit to SSD was exactly as described and delivered to the UK quickly. Upgrade was so easy with the supplied video and instructions. Restored from a time machine backup and all good! New lease of life for something so great, perfect screen and for zoom calls.

OWC know their stuff!!!

I would recommend this item to a friend! This review is from DIY Kit for 2011 iMac's factory HDD: 480GB OWC Mercury Extreme Pro 6G SSD.. Customer Videos:

Verified Buyer
Reviewer: HeartMyMac Location: Bryan, TX Age: 55-65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Great Merchant! June 28, 2020 I stumbled upon MacSales.com by accident when I was searching for info on replacing the hard drive on my iMac that had crashed. I found the products I needed at a reasonable price as well as a video with step-by-step instructions. My order arrived promptly and I got my computer up and running quickly and painlessly! Thanks MacSales!

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

Verified Buyer
Reviewer: PierreZee Location: Montréal, Qc, Canada Age: 45-54 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Mid 2011 iMac rejuvenated September 9, 2018 Yes, iMacs are not the easiest machines to fix or upgrade, but with care and the help of the DIY videos, changing a dead hard drive for an SSD is definitely possible. I took my time, followed the instructional video step by step, and now my mid 2011 iMac is lightning fast and feels brand new.

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

Verified Buyer
Reviewer: CaptKurt Location: Texarkana, TX Age: 45-54 Experience Level: Hobbiest Owned Product: over 6 months
Rating: 5/5 Spot On...Easy to follow directions July 13, 2018 Parts ordered were exactly as advertised...at the best possible price. Installation of the SSD in an iMac went smoother than I thought it would. I will definitely be a returning customer and have activated my account. Thanks OWC...I saved my Mac from a certain HDD death!

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

Verified Buyer
Reviewer: flyingmac Location: Brazil Age: 45-54 Experience Level: Home User
Rating: 5/5 very nice product June 5, 2018 Very nice product.. my mac is flying...

I would recommend this item to a friend! This review is from DIY Kit for 2011 iMac's factory HDD: 120GB OWC Mercury Extreme Pro 6G SSD.. Customer Videos:

Verified Buyer
Reviewer: CreativeM Location: NY Age: 35-44 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 OWC Mercury Extreme Pro 6G SSD is AMAZING! March 25, 2018 SUPER FAST!! UNBILIBABLE! You won't regret!

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

Verified Buyer
Reviewer: ITnewbie Location: FL Age: 55-65 Experience Level: Noob Owned Product: 1-3 months
Rating: 5/5 Customer Support is Tops! January 21, 2018 Not knowing what I was doing, I needed to make sure I was purchasing the correct kit. I called and Customer Support walked me through everything I needed to know, including boosting my courage about doing this upgrade myself. Didn't feel rushed while all my questions were answered with patience and knowledge. Project was successful and in fact did it again with a second computer. Thank you MacSales!

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

Verified Buyer
Reviewer: CYR007 Location: KL, Malaysia Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 4/5 Speed for my ageing Mac... December 7, 2017 Fitted the SSD with dismantling challenges. Most difficult part was to bing the Datas from my old spinning HD to the SSD. Can only recommend the product.

Delivery to overseas was also no issue.

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

Verified Buyer
Reviewer: RonJon Location: Puyallup, WA Age: 45-54 Experience Level: Noob Owned Product: 1-3 months
Rating: 5/5 DIY Kit for 2011 iMac's factory HDD: 1.0TB OWC Mercury Extreme Pro 6G SSD. April 19, 2017 This was my very first experience doing any kind of an upgrade on any computer and it was awesome! First of all the customers service at OWC is above and beyond any other online experience I've had. The sales rep showed me how to look up all upgrade info on my iMac and helped me make the right choices for what I do. I made my order and the components arrived promptly using standard postal service. While waiting for the parts I spent time watching the how to videos on how to change out the Ram as well as the Hard Drive in my iMac. I must have watched it least six times wondering if it could indeed be as easy as they made it look. Surprisingly, it was! I timed how long it was taking my iMac to boot up before I did any upgrades. It was taking one minute and six seconds to boot up. After the upgrade, my iMac now boots up in 24 seconds! It's like having a new iMac at a fraction of the cost. My mother-in-law was so impressed she had me order the components to do an upgrade on her macBook Pro. Keep up the good work OWC I look forward to a long relationship.



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

Verified Buyer
Reviewer: Minister Location: San Diego Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Best Decision for Upgrade of iMac 2011 21.5 January 31, 2017 I ordered the 1TB OWC Pro SSD kit with adaptor and tools. I was able to install the OWC SSD 1tb Elite Pro into my iMac 2011 21.5. The installation video was tremendous and indispensable. The replacement went off without a hitch and although I had never opened my iMac before it was relatively simple. My 6 year old iMac runs so much faster. Boot time faster and applications open 4-5 times faster if not more. I'm just disappointed I didn't do this upgrade sooner. I use my iMac about 4 hours a day for work and I'm still so pleased after a month. Thanks so much for a great tool kit as well as the OWC Thermal Sensor. I've had no issues since upgrading. Thanks again!

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

DIY Bundle 1.0TB OWC 6G SSD and HDD Kit for all 2011 iMacs Mfr P/N: OWCKITIM11HP1TB OWC SKU: OWCKITIM11HP1TB Complete DIY kit for upgrading your 2011 iMac's hard drive 5 Year OWC Limited Warranty Ships: Same Day Only $271.97Bundle Priced for $224.00
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