I almost can't even stand to use my iMac the last couple of days. I cannot even put into words how aggravating this is. My iPhone never loses its connection so I know it's nothing to do with my modem or router, it's Mavericks that caused this. Every few min my internet stops working and I have to turn wi-fi off then back on to get my connection back (for a few min). I've spent all night Googling and trying every possible solution that I've seen mentioned and nothing helps. I am so frustrated by this.