32GB (4 x 8GB) 1333MHz DDR3 SO-DIMM PC3-10600 204Pin SO-DIMM CL9 Memory RAM Upgrade Module Compatible with Mid 2010/2011 21.5 & 27 iMac Models (OWC1333DDR3S32S) TAA Compliant

Received package in a timely manner and followed the instructions on my iMac 27" to install. The two cards fit as designed and no issues installing. The iMac read the additional memory and the computer is now maxed out to 16GB of memory and working perfectly.

Amazing fast delivery to EU. Using memory only a couple of weeks. Everything is cool.

You can't go wrong with OWC ram for a Mac. They just work at a reasonable price. I recommend them.

Easy to install and improved Mac performance!

The item received was exactly as described. It installed quickly and easily. Performed as expected.

It worked perfectly. Thanks

Buen producto

Installation can be tricky...be sure to push the memory in tightly or it may seem like it is defective. Took me two tries to get it correct.

First time I've ever tried to do anything to my MAC, usually through fear of wrecking everything. But these memory were very easy to install on my mid-2011 machine (having first checked out Youtube). The most obvious improvement is that applications now open almost immediately, instead of having to wait 20 seconds or more. Also the Mac connects to wi-fi almost instantly from sleep mode, which previously could take up to half a minute. Very happy.

I got the 2x 4GB OWC memories for my old MacBook Pro (2011) which originally came with 4GB DDR3 RAM in the hope the upgrade would alleviate the potential strain on the performance in further use. The memories slotted into place easily and the System recognised it immediately, although the speed is higher (1887 MHz) than the original (1333MHz), which is presumably better.The price of the 8GB seemed to justify the purchase for what it was intended - to get the laptop into working shape for the basics, as I also intended to replace the old battery which was deformed, pushing against the trackpad making it almost unusable.At present the fan is on most of the time and am trying to ascertain the cause. I don't believe the new increased RAM has anything to do with it but the High Sierra macOS v.10.16.4 or some bug.

Upgraded my Mac Mini (mid 2011) from 10.6.8 to El Capitan then to High Sierra and now it’s 10.13.6.The machine then became incredibly sluggish. Open one window and it would literally take 2minutes to open. I off course did all the recommended solutions I’ve found online and noticed not much of a difference.My machine’s RAM was 2GB!! Yes. Ridiculously low by today’s standards and so upon researching many RAM cards I decided to buy from OWC the 8GB RAM cards and WOW!!My machine is back to running smoothly and efficiently.Be cautious. There are two sets of 8GB sold by OWC, 1.3V and the 1.5V.If you have the same MacMini as me then go for the 1.5V, which these RAM cards are.So MacMini, mid 2011, model 5,1, with 8GB RAM runs OS High Sierra 10.13.6 perfectly.Hope this helps.

Easy install to MacBook Pro, and can see instantly the difference in how quick the Mac has become. Well worth the price.

Revived my old Imac27 - an easy and well priced upgrade.