Corsair Apple Certified 16GB (2x8GB) DDR3 1333 MHz (PC3 10666) Laptop Memory 1.5V

My Macbook Pro (13 inch, early 2011) works so much more smoothly now! Things don't load instantaneously or anything, but they are much faster and when they do open my laptop can handle multiple at a time! I see the spinning loading cursor much less often and my computer functions much more efficiently.To give you an idea of the difference this makes, a few days before buying this, I had three windows open: Chrome, Word, and Spotify; my computer was working at a snail's pace and I could barely get anything done. I wasted almost an hour trying to open Word, look up instructions, open a file, and switch footnotes to endnotes.When I first installed the new 16GB, I opened app after app until every single app on my dock was open and running (about 24 apps in all, including Word, Powerpoint, Spotify, Steam, iTunes, and the App Store, among others). Once they were all open, my computer was working so well that the fan wasn't even activated. I was using about 10 GB of memory or so, and using the apps was a breeze.It was so easy to install too! I recommend looking up instructions online and maybe buying a tiny screwdriver if you don't already have one, but I had no issues and had replaced my old memory in less than 5 minutes.I can't recommend this enough. However, if you only plan to be using your computer for things like email, social media, and so forth, I think the 8GB (2x 4GB) option would suffice. The reason I went for 16 is that I often do photo editing and digital art and wanted to be sure that these programs would function smoothly.If anything changes with functionality, I'll update my review. But for now, I couldn't be happier. My laptop can multitask again!!

I inherited a 2011 iMac back in 2014. I'm a PC user, and only fiddled a bit with the iMac, until trying to back up my late mother's files before a cross country move with it. Afterwards, I began to use it a bit more, but was constantly frustrated by slow performance. I went again to look at my mother's files, apps, et al to see whether I should just do a factory restore. I wasn't comfortable with that yet in the end, and seeing that the hard drive still had plenty of space, I took a look at the memory. The iMac still had the original 4 gigs loaded.Mom had been pretty tech savvy, and was almost always upgrading and refreshing her equipment - so to find that she had never upgraded the RAM was really surprising.I looked up the install instructions and went window shopping for an upgrade, ultimately bringing me here.Once the new bits arrived, I pulled the old sticks, and popped in the new ones (super easy). I did notice that one of the sticks seated a bit more easily than the other, but that they were both a little stiff and tight compared to the factory sticks I'd just pulled. Upon boot, I got beeps - meaning something was off. I unseated the new sticks, reseated them, and tried again.Success!No more spinning pinwheel or bouncing icons for me!

Awesome! I was pretty wary about installing this RAM myself, after an almost disaster installing it on my last Mac (there was smoke involved...) Installing this on my 15" Macbook Pro (Early 2011) was MUCH easier and worked like a charm the first time. I looked at a few different tutorials for tips first. The whole process only took about 10 minutes. The speed bump was definitely noticeable, but I opted to replace my hard disk (HDD) with a solid state drive (SSD) also. My computer has gone from being almost useless (5+ minutes to get logged in...everything took forever to load...couldn't even use iPhoto anymore) to like new! Things load quickly and I can actually multi-task! Cosmetically my computer looks like new and my battery life is still decent so this was a welcome upgrade for a relatively small amount of money ($300 is cheaper than a new computer). Now I can hold off on upgrading until the models are upgraded a bit more.

Works perfect so far on my MacBook Pro (early 2011). It originally came with 4 GB of memory and with the latest macOS upgrade, it turned my computer so slow, I couldn't do anything with it. Every click of the mouse was a real pain. All my computer resources was completely being tapped out. Upgraded my MBP with new 16 GB memory along with a new SSD. No issues with the installation. Just watch a couple videos online because its very easy to do it yourself. You just need to make sure you have some decent set of mini screw drivers to take off the back panel. What a difference it made with the combination of more memory and new SSD. It now feels like a brand new computer now. Brought new life back to my Mac and it feels like I can squeeze another 2-3 years out of this before I need to buy a new computer.

I put these into my "Early 2011" 13" MacBook Pro, replacing the 2x2GB chips that came with the original, and (1) the 2 chips inserted perfectly with upmost ease, and (2) when I turned on the computer, all 16GB were recognized (even though originally this computer was said to accept only 8GB maximum). What is more, the added memory made my computer perform "like new." Be fore improving my memory, I was constantly interrupted by the little twirling colored wheel, and now I barely ever see it. This well worth the investment, and this brand did prove to be fully compatible with my Mac.Warning: to open the computer I had to buy a micro-screwdriver because the Phillips screws are so tiny. However I found what I needed at Home Depot (as opposed to a specialty store) and the screws have standard heads, as opposed to the screws on an iPhone, which have a 5-star configuration.