The first time I had just started using my mac, so there wasn't much on it. I think I was running maybe safari and iTunes. This time I was using iTunes, Safari and Frostwire. I was listening to preview clips on iTunes and I went to listen to one and when I double clicked, nothing happened. I restarted it numerous times and even unplugged it. When I would start up, the mouse would move, and the dock would magnify, but I couldn't click anything. Strangely, I started trying different keys and the keyboard was able to do things. (Very few since I'm still learning mac) Could it be my mouse? It's a bluetooth MM. I would't think so since it could move around...