You can either use Crucial’s System Scanner tool or Memory Advisor tool to help you find the right memory upgrades for your computer.

I recently purchased a 13-inch MacBook with 1GB of RAM. I found that I could purchase 4GB of RAM online for around $125. Would it be easy and worthwhile to upgrade my machine?

Absolutely. We recommend putting as much RAM as possible into your Mac for the best system performance. Purchasing extra RAM is one of the best investments that you can make for your machine, and it’s incredibly easy to install on all Mac models (except the MacBook Air, which you can’t install more RAM in, and the Mac mini, which you can upgrade but only after prying the case open with a putty knife).
The manual that came with your machine can give you step-by-step instructions on how to install the memory.

To get more RAM, check out Crucial (www.crucial.com), Other World Computing (www.macsales.com), Ramjet (www.ramjet.com), Corsair (www.corsair.com), and Buffalo (www.buffalotech.com).