This upgrade greatly improved the speed of the MacBook.

Speed and temp all check out, no issues, RAM test found no problems.

Added to my 2012 iMac to boost processing speed.

Before upgrading my ram I would have to close itunes before opening photoshop because the speed was terrible

I haven't noticed any top speed differences when the app is running, but I haven't seen sluggish performance that I used to experience.

Fantastic speed improvement over original equipment from Apple, and only half the price of OEM ram upgrades

Got these for my mid-2011 iMac 21.5" to help boost up some speed

Compatibility is good and speeds are decent.

Speed of Mac improved drastically - a definite economical option to purchasing a newer model.

Great price and speed.

Amazing speed increase in operation, I have MB Pro late 2011.

Loved the speed and tutorials on crucial website

Aswome products work great for my laptop fast speed awesome price fast shipping

I purchased this along with a new SSD hard drive to upgrade my late 2011 15' macbook pro and it has significantly improved the speed of my computer.

After OSX Mavericks came out, the speed of my computer slowed to a crawl.

If you are experiencing slow Mac speed, consider this!

this is an easy way to increase that speed and love your computer again.

Helped boost the speed of my Macbook Pro (Early 2011)

This really boosted the speed on my laptop, works perfectly

This really boosted the speed on my laptop, works perfectly

Up and running on my late 2011 MacBook Pro! Seems to be an excellent speed increase over the stock 4gb