Corsair CMSA4GX3M1A1333C9 memory module 4 GB 1 x 4 GB DDR3 1333 MHz

Corsair Mac Memory Upgrade Kits: Guaranteed Performance, Compatibility, and Support.
Corsair's 4GB and 8GB Mac memory upgrade kits will help your system work better. With hassle-free compatibility and renowned Corsair reliability and support, they're a smart performance investment.

One of the best ways to improve your Mac's performance
Applications use memory, and some of the applications that run best on the Mac — photo and video editing — use lots of it. That's why outfitting your Mac with a Corcair Mac Memory upgrade kit is one of the best things you can do to maximize your system's performance and agility.

With a Mac that's been upgraded to the maximum amount of memory it supports, you'll spend less time waiting for your applications to buffer data to the hard drive, and more time working — or playing. Upgrading memory can also be a cost-effective way to get more life out of your older system: before you trade up to a new one, just upgrade the memory.

Tested at Apple Developer Compatibility Labs for Guaranteed Performance
Corsair's Mac memory kits are tested at Apple Developer Compatibility Labs and work with most MacBook® Pro, iMac®, and Mac mini systems shipped in 2011.

Not sure if your older Mac will work with 8GB DDR3 SODIMMs? Get in touch with us, and we'll help.

Limited lifetime warranty, support and service
Corsair has been making high-performance memory for just about as long as high-performance memory has existed. Countless customers worldwide rely on Corsair for performance, reliability, and value. Our reputation is important to us, and that's why all Corsair DRAM products are backed by a limited lifetime warranty. If you ever need help, we're available by phone, email, and web forum.