can you put a 4gb ram with a 2gb ram in macbook pro 2009
I am looking to add more RAM space to my mid 2009 Macbook Pro (13 in). I am wondering if it's possible to add a 4gb ram space with the already installed 2gb? Will this cause issues if installed? I am having trouble finding 2gb for my Macbook and don't want to get a generic RAM incase of potential issues.
MacBook Pro, Mac OS X (10.6.8)