Chris is still having issues with OS X Mavericks and wonders if upgrading to 8GB of RAM would help it's performance. Leo says not really unless he's doing video or photo editing. If the Mac is running slow, it won't hurt to double the RAM. 8GB is a bit of a sweet spot, though, and it could help if he's having performance issues with the OS. But the real issue could be Mavericks itself. It's filled with bugs and Apple needs to fix it. The chatroom also says to go into the activity monitor and view his RAM usage. That could show him where the issue really lies.