Hi, I've just purchased a Mac Pro 2.1. I'm the owner of a Macbook Pro and an iMac. How do I connect to the internet in my house with my Mac Pro? Sorry to sound dumb, it's just I didn't set up the wifi network for the other two. Do I need something plugged into the computer like an ethernet or can I simply search for the network? Thanks a lot, and sorry again for my novice understanding.