Pros: one didnt fail

Cons: one stick out of 2 failed in less than 2 years

Pros: RAM is mislabeled and doesn't include DDR3-1066 2009 Mac Models. Just installed on my MB Pro 2.66ghz 2009 and writing this review on it. Second purchase - also have this RAM in my same era MacMini.

Cons: None

Other Thoughts: Slight speed increase right off. For more serious speed, you'll likely want an SSD first. But if you're doing RAM intensive stuff, you'll need this as well. I have Corsair stuff all over - PSUs, Cases, RAM, etc. Good stuff.

Pros: Works.

Cons: None.

Other Thoughts: Just installed in my wife's 15" MacBook Pro Mid-2010. Some older reviews from 2013 said this RAM did not work in their Mid-2010 MacBook Pros so I was a bit nervous about buying it. However, some of the newer reviews from 2014 stated this upgrade worked in 15" Mid-2010 MacBook Pros. Perhaps Corsair has worked out some kinks since 2013.

Regardless, make sure you do your research before you buy. Ensure you are buying RAM with the correct speed supported by your particular MacBook or MacBook Pro. I almost made the mistake of buying the 1333MHz version.

Pros: Works great
Cheap
Added a few years to my mid 2010 Macbook pro

Cons: None

Pros: Great product, works great on my later 2009 macbook.

Cons: none

Pros: Excellent and reliable. We install this memory in small form factor units in stressful environments and they take the abuse.

Cons: None

Pros: Works as it should. I made sure that I had the newer firmware MBP51.007E.B06 and newer than Snow Leopard OS X on a Late 2008 MacBook5,1 as demanded to recognize more than 4 GB of RAM to take advantage of this. The memory was recognized immediately and speed as well as application load capacity was increased as expected. The website http://everymac.com/ (no affiliation) should always be consulted first when performing any upgrade of your Mac. That is what told me that this upgrade was possible, even though Apple said it wouldn't work.

Cons: None

Pros: Just dropping a quick review to vouch for the quality and ease of installation of this RAM with my Macbook Pro mid-2009 2.53GHz. The install took about 5 minutes with no real difficulties encountered. I bumped up from 4GB and noticed improvements in startup time and system responsiveness with OSX 10.9 Mavericks.

Cons: None

Other Thoughts: Follow the installation instructions, take your time. It's well worth it!

Pros: Ram working fine in a Macbook Pro mid 2009 with Unibody.

Received the Ram with a 16x256 configuration which was required for this type of device.

Cons: None.

Pros: Fast. Work like wonder on my mid'09 13" macbook pro 2.53

Cons: none so far

Other Thoughts: I put 4 stars since I only use this for less than a year, so don't know about the durability yet