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OWC Internal SSD DIY Kit for All Apple 21.5" iMac 2011 Models
iMac to SSD SATA 6Gb/s cable, iMac to SSD power cable, and thermal safe adhesive mounting set

OWC Internal SSD DIY Kit
This kit does not include the tools required for performing this upgrade.
If you need the full upgrade kit with tools, you want to purchase this OWC Internal SSD DIY Kit.
Add a 3G or 6G Solid State Drive (sold separately) to your hard drive only equipped iMac to experience faster booting, near instant application launches and data transfer speeds up to 559MB/s!

Before attempting to perform this installation, please watch the following 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. Technical support for this DIY product consists only of the installation video.
Turnkey Upgrade Installation Program
While OWC encourages the DIY philosophy, this is a very difficult install that requires advanced skills. If, after watching the how-to video, you are not fully confident of your ability to add an SSD to your 2011 21.5-inch iMac, you can choose to have OWC "Do It For You" via our Turnkey Upgrade Installation Program.
  • iMac to SSD SATA 6Gb/s cable
  • iMac to SSD power cable
  • Thermal safe adhesive mounting set


  • iMac to SSD SATA 6Gb/s cable
  • iMac to SSD power cable
  • Thermal safe adhesive mounting set

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... Learn how to find your Mac's model ID
iMac Intel
iMac (21.5-inch Mid 2011)
(May, 2011)
Model ID: iMac12,1
2.5GHz i5, 2.7GHz i5, 2.8GHz i7

Customer Ratings

Write a Review 4.8 / 5 9 out of 9 (100%) reviewers would recommend this product
Verified Buyer
Reviewer: LWHSNetworkAdmin Location: San Francisco, CA Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 4/5 Functional but not flawless February 2, 2017 I purchased just the DIY SSD kit components (no tools) for upgrading 6 21.5" 2011 iMacs with DIY Fusion SSD/HDD (purchased an SSD and extra memory separately).

The good: - Adhesive patches were exactly the right size to adhere the SSD to the case behind the ODD without bumping into it or covering any labels on the SSD; - The kit just worked, first time every time for each installation I've performed so far

The bad: - SATA cable connector really needs to be right-angle in the appropriate direction at the board; straight connector gets wedged really tight, which makes my job harder as a systems admin/builder; - The SATA cable could also be a bit shorter (possibly 12"); there was at least 4-6" of unnecessary cable that I found I needed to pack into the case; and - Needs to be a little easier to remove the protective film from the adhesive patches; I often found myself pulling up bits of the adhesive trying to remove the protective film.

Overall, it's a great way to breathe new life into older hardware; our 2011 i5 iMacs upgraded with 20GB RAM and a 740GB Fusion drive perform comparably with our more modern i5 and i7 iMacs in boot speed, launch speed and overall performance.

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

Verified Buyer
Reviewer: mattwood Location: Los Angeles CA Age: 25-34 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Worked great! January 8, 2017 Cables worked great, iMac is running smooth and FAST. This upgrade is not for beginners mind you, it had been a few years since I'd done any repairs on a MID 2011 iMac and even I had to retrace my steps carefully to ensure proper installation.

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

Verified Buyer
Reviewer: Anonymous Location: Berkeley, CA Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 SSD Alive March 26, 2016 Purchased an SSD and the necessary cabling package. Relied upon the video tutorial. Only suggestion would be to slow down the installation steps where it gets dicey. In a few instances it was more legerdemain than exposition and no rewind really revealed the details. And since the video can be at different angles it takes a while to make sense of which way is up.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Mdwycyoff Location: Indiana Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Kit works as designed. Installation is not for a novice. June 2, 2015 The SSD kit (with reengineered SATA cable still has straight connectors and a fairly stiff cable, but connectors ARE short enough to allow proper reinstallation of the motherboard without creating pressure on the motherboard itself) The power cable and sticky foam tape work just as designed, since the SSD has no moving parts, and hence no vibration. I pre-formatted the SSD with Yosemite in an external USB housing and was using it for a while before this internal installation, so I knew the SSD was working properly. While my mid-2011 21.5" iMac was apart to install the SSD, I also upgraded the original 500GB 5400rpm 3Mbit/sec Seagate drive to a 1TB 6Mbit/sec 7200rpm Hitachi drive using the full OWC HDD upgrade kit with tools and 2nd generation temperature sensor. So now I have a dual-boot system with two different versions of OS X: 10.8.5 on my 1TB hard disk, and OS X 10.10.3 on the SSD.

Patience is a virtue during installation. I also recommend wearing thin cotton gloves when removing and reinstalling the display panel. That makes certain that you will NOT get any fingerprints on the display surface. I also used a can of compressed air to remove accumulated dust from the fans, and a cloth to wipe the back of the display and internal surfaces that had collected dust during my first 18 months of ownership. The heat-generating components inside the 21.5" mid-2011 iMac require cooling fans and plastic shrouds to direct airflow. All those parts fit together with precision, and once taken apart, all these pieces will only go back into place with patience and a bit of fiddling. I found that removing the upper right of the plastic airway shroud behind the motherboard and then easing it back into place WITH the motherboard during reinstallation made it much easier to return everything to the proper location so the motherboard assembly could be aligned and screwed back into place. The installation process is not particularly DIFFICULT, but there are many many steps and many thin wires and cables with tiny connectors that first must be carefully disconnected when disassembling, and then carefully reconnected during reassembly. Yes, they COULD be damaged if mishandled. If you are experienced in taking modern computers apart and reassembling them, then go for it.

It is a HUGE help to have another computer right there to play the OWC installation videos available on YouTube. I had my retina MacBook Pro on the desktop beside me, and was able to view and replay the video as often as needed. In all, I took my sweet time and spent about 2 hours doing the dual upgrade - SSD and hard drive with OWC sensor cable, not including time spend installing Yosemite on the SSD, nor cloning the original HDD to the new one. Reinstallation went smoothly. I plugged it in, turned it on, and the dreaded 3 beeps! I somehow managed to transfer a tiny bit of the adhesive from the SSD foam tape onto a finger and onto one of the RAM module connectors. Powered off, and a quick inspection and thorough cleaning of the RAM connector, reinstalled, and the system booted normally. Then I noticed a tiny dark semicircle at the bottom right of the screen near the Trash icon. I wondered how I could have cracked the display glass in such a perfect semicircle while gently wiping with the lint-free cloth. I used the suction cups to again remove the front glass panel for a closer inspection, and reallized I had gotten a piece of blue thread (from the lint-free microfiber cloth, apparently) on the display. A flick of the finger, and it was gone.

I would recommend this item to a friend!

Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: Colorado Age: 35-44 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Great Product March 23, 2015 Easy installation and thorough installation video

I would recommend this item to a friend!

Reviewer: Anonymous Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Tedious but complete January 21, 2015 The process of installing an SSD under the iMac's optical drive is tedious. The parts in this kit are simple to use and of good quality. The instruction video on OWC's YouTube channel is thorough and done at a helpful pace. I would come directly to OWC for any future mac upgrade projects.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Braga, Portugal Age: 35-44 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Product work fine. 5 stars November 23, 2014 I would recommend this item to a friend!
Verified Buyer
Reviewer: Anonymous Age: 25-34 Experience Level: Hobbiest Owned Product: over 6 months
Rating: 5/5 Tricky to install but work well November 23, 2014 The site provided all the information and a in -depth video showing the full installation process. It was the first time I've opened up a iMac for any reason and I am glad the video helped a lot.

Instructions are easy to follow and end result is a much faster Mac. Very happy with the purchase.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Buffalo, NY Age: 45-54 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Excellent experience from start to finish October 15, 2014 It all started with an online chat with Tom. While the store is fairly easy to figure out I like to verify things to avoid headaches for everybody. I chose the free shipping method so my stuff arrived in 1 week as stated. Upon opening the package everything needed for the ssd install were there.

I got to work. This was my first install of an SSD in an iMac. The video tutorial is what made me choose OWC. I really appreciated the care that was put into making the video. It was so easy to follow along and imitate what was being done.

I really suggest this upgrade to my fellow iMac users. It took me 1.5 hours to complete. There are some areas of the project that are a little scary but nothing too bad. The end result is an upgrade that makes it feel like you got a new Mac.

I would recommend this item to a friend!

OWC Internal SSD DIY Kit for 21.5" Apple iMac 2011 Models Mfr P/N: DIDIM21SSD11 OWC SKU: OWCDIDIM21SSD11 OWC DIY Kit for all Apple 21.5" iMac 2011 Models for installing an internal SSD into a system currently equipped with hard drive only. Tools not included. Ships: Same Day Only $29.99OWC Price $14.75 $9.75 with qualifying purchaseAdd to CartOther World Computing DIDIM21SSD11 In Stock, Click to Buy Now
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