My Macbook keeps losing it's wifi connection. Sometimes it's after a few minutes, sometimes it's after downloading a certain amount of data. It's not my home network, because my iPhone and other computer scream on it. So I thought I might have a bunch of settings jumbled, and reinstalled OS X. This didn't solve it either. I'm actually on my macbook posting right now, but it's taken me 4 re-starts to post this message... Is this a hardware issue? If so, how the heck do I fix it? Is the wifi card part of the mobo in teh macbook?