Crucial Technology 4GB, 204-pin SODIMM, DDR3 PC3-10600,

I got this to upgrade my late 2011 15" MBP (2.2g i7). I originally had 4GB, but it wasn't enough when I'm working on a lot of things have multiple Chrome tabs open, Word, Acrobat Pro, Photoshop, Illustrator, Spotify, and Evernote occasionally. I still had Mountain Lion and wanted to upgrade to Mavericks. Plus, a friend gave me ProTools 10 since I wanted to experiment with recording and editing some music. So, I definitely could use a memory upgrade...Apple said that that my machine can only only be upgraded up to 8GB, until I read from others that a 16GB works. Then I went to the Crucial site, ran their memory advisor, and this kit came up on top of the result. Before purchasing, I've read some opinions that the difference between a 16GB and an 8GB is hardly noticeable. However, since I plan on eventually replacing my HD with a SSD, and just for about $60 more, I just went for this 16GB kit. Much cheaper and less hassle in the long run if you plan on upgrading to 16GB later. I don't know about you, but I prefer to have same size ram for each of the slots, which is also recommended anyway...And did I mention it was SUPER easy to install? Just follow the instructions on the Apple site and make sure everything's properly inserted as there's kind of a trick to it (you'll hear a click/snap that tells you it's in). I guess my only advice is to be gentle from when you open the case to removing the old memory, especially on the first time. There are times when it feels like something won't budge. Instead of going full force, just gradually increase pressure and you might have to wiggle some stuff a bit. It also helps to have the right tools, especially if you don't want to void your warranty...So, with the 16GB memory and a clean install of OS X Mavericks, my MBP runs 3/4 times faster. Adobe CS apps load within 3 seconds and there's no lag when switching in between apps. I've had the memory kit installed for about 3 months now, and I never had any problems, nor have my machine get really loud (and sometimes hot) when running intensive applications. I'm a happy panda so far!

Jumping from the factory original skimpy 4GB of RAM memory all the way up to 32GB of memory with two of these 2X8GB Crucial memory kits was incredibly beneficial for my 27" mid-2011 iMac which I use many hours each and every day and rely upon for both work and fun. I did the upgrade several weeks ago and have never looked back. Now, I have no more pinwheels or spinning beach balls. No more cherry red moving blocks in the "memory" section of Activity Monitor -- just a skinny green line near the bottom of the box. No more buffering for videos. No more nagging error messages with browsers. No more required "force quit" actions. No more unwanted restarts. No more waiting and waiting and waiting for files to load. No more sluggish Time Machine backups. No more annoying crashes or freezes. I can (and do) use two different memory-hungry browsers at the same time with more than 20+ tabs open in each one with absolutely no diminution in performance and huge chunks of memory available to spare. And opening three or four other memory-heavy programs at the same time the browsers are open makes no difference at all to the operation of the iMac.This was an easy fix and an easy task to complete for someone who is usually not comfortable doing these kinds of things with electronic devices. The process takes about five minutes and is carefully explained in full detail in manufacturer's pages and in helpful YouTube videos available everywhere. Everything worked exactly as prescribed without any glitches or unexpected problems. So, again, "do it now" if you are having problems with your computer and have only the minimum memory supplied by the manufacturer. That's not enough for today's programs, apps and operating systems, and this fix really works.

Just installed 16GB of DDR3L 1333 on my early 2011 Macbook Pro. I'm not very tech-savvy, however installing this was quite easy. The reason for purchasing this item(s) was because I finally upgraded to El Capitan OS X, which slowed down my cpu significantly. Pages, Chrome, and Word took much longer to load after this software update. I read that it was possible to do 16GB instead of simply 8GB (the latter being Apple's recommended Max), and so I gave it a try. This is Day 2 with the new, updated hardware. My computer is running FAST and SMOOTH -- no delay in opening my programs, even if opening multiple ones quickly (this would've killed my system a few days ago it seems). Hence, my review. This is working very well and I hope it continues to do so. My Mac is recognizing 16GB under my system preferences. I'm told they don't "support" 16GB, although I don't know exactly what that means.Also, I read I'm supposed to "test" my new hardware. I don't really know how crucial that is or how to do it. So, please note that I have not ran any specs on this (that is, "hardware tests") to see if everything is working properly before writing this review. Things just happen to be going well at this point, so I'm rejoicing enough to type this out. Bless you all.