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DIY Bundle

and Internal SSD Kit for 2011 27" iMacs

Mercury Electra SSD and SSD Bay Solution
Upgrade with Confidence!
The complete solution for your 2011 iMac
Configuration flexibility is yours when you add a second internal drive using the OWC SSD bay kit. Boost your storage capacity by adding additional storage, and enjoy near-instantaneous boot and app loading times thanks the performance of an OWC 6G SSD.
Fast and reliable solid-state storage
Delivering the latest in flash NAND and controller technology, utilizing QLC and 3D NAND for long-lasting, power-efficient performance, the OWC Mercury 6G SSD line offer a powerful combination of performance and reliability for demanding everyday computer users.
We are here to help
OWC's SSD bay kit comes backed by OWC's award-winning U.S.A. based technical support team which is readily available to assist you with your upgrade should you have any questions. If you are not fully confident of your ability to add an SSD to your 2011 27-inch iMac, you can choose to have OWC "Do It For You" via our Turnkey Upgrade Installation Program.

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.

1.0TB Mercury Electra 6G SSD Specifications:


Phison PS3112-S12 with 3% over-provisioning
NAND Flash Components
Micron Synchronous Quad-Level Cell (QLC) 3D NAND Flash
Form Factor
Standard 7mm 2.5"
SATA 6.0 Gb/s
Capacity 1
1000GB Useable Capacity
Total Flash Memory Components: 1024GB
24GB Allocated to real-time data redundancy and error correction
Formatted Capacity1
931 GiB
RAID Support
SMART Attributes
Standard 2
Native Command Queuing
Up to 32 simultaneous commands
RoHS Compliant
Reach Certification


Height (max)
0.7 cm (0.3 in))
Width (max)
7.0 cm (2.8 in)
Length (max)
10.0 cm (3.9 in)


MTBF (Mean Time Between Failures)
1,600,000 hours
Secure Erase
Crypto Erase
Error Correction
Built-in ECC
TRIM Support
OS Dependent
105TB total bytes written (TBW), equal to 58 GB per day for 5 years
Nonrecoverable Read Errors
Less than 1 sector per 1016 bits read


Mac OS Compatibility
PC OS Compatibility
Other Requirements
Requires a Mac, PC, or drive enclosure with an available SATA drive bay. SATA III (6.0 Gb/s) required for best performance.


Sequential Read (Max)
Up to 525 MB/s
Sequential Write (Max)
Up to 516 MB/s
Sequential Read (Average)
513 MB/s
Sequential Write (Average)
512 MB/s


Write Mode (Max)
Up to 1.8 Watts
Seek Mode (Max)
Up to 1.8 Watts
Idle Mode (Max)
Up to 0.09 Watts

Environmental (Operating)

1500 G max at 0.5 ms
Temperature (°F)
32°F to 158°F
Temperature (°C)
0°C to 70°C
5% to 95% non-condensing

Environmental (Non-Operating)

1500 G max at 0.5 ms
Temperature (°F)
-40°F to 185°F
Temperature (°C)
-40°C to 85°C
0% to 93% non-condensing


Idle (Typical)
0.0 bels
Seek (Typical)
0.0 bels
  1. 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. 
  2. Temperature reporting is currently an unsupported feature because due to the operating characteristics of SSDs, it is highly unlikely one would ever exceed an OWC Mercury SSD's stated operating temperature ceiling of 158F/70C. However, we are looking into supporting this feature in the future via a firmware update. Firmware updates can be found here: http://eshop.macsales.com/tech_center/OWC/SSD.

Manufacturer provided specifications for Other World Computing p/n K27IM11SE1TB UPC#: 812437025910


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


  • (1) OWC Mercury Extreme Pro 6G SSD
  • (1) SSD Power Cable for 2011 27" iMac
  • (2) OWC 2-1/4" Suction Cup
  • (1) Torx T10 driver
  • (1) Torx T6 driver
  • (1) Phillips #2 driver
  • (1) Nylon Pry Tool (Spudger)
  • (1) iMac Adhesive tape set for SSD installation
  • (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.

3 Year OWC SSD Limited Warranty on the OWC Mercury Electra 6G SSD

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 / 5 1 out of 1 (100%) reviewers would recommend this product
Verified Buyer
Reviewer: I90Tom Location: Southern Minnesota Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 4/5 Tough project, missing tools in kit August 14, 2016 This was a lot harder project than I expected after watching video. It took about 3 hours. I was playing, pausing and rewinding the instruction video on an iPad. Getting the screen connecters off while carefully trying not to touch the screen and holding a flashlight was the biggest challenge. The video glosses over some steps. The kit didn't included the tweezers or a number 6 Torx. The number 8 Torx wasn't needed. Fortunately, I had a number 6 in my tool box. The tweezers I found in the medicine cabinet didn't work very well. After adding SSD, I had to struggle to find instructions to initialize and format new drive. Migration of data took hours, but now that I'm running off SSD, it boots lightning fast, no longer beachballs loading apps and feels like a brand new computer.

I would recommend this item to a friend!

DIY Bundle 1.0TB OWC 6G SSD and Internal SSD Kit for 2011 27" iMacs Mfr P/N: K27IM11SE1TB OWC SKU: OWCK27IM11SE1TB Complete DIY kit for adding an SSD to your 2011 27" iMac's internal SSD bay. 3 Year OWC Limited Warranty Ships: Same Day
Supply Limited: 2 available
Only $174.98Bundle Priced for $155.75
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