Unity Mac - Exported application closes on launch

Hi! So I have been working on a game project for about 2 months and I have had no real problems with the process. This morning, I went to export my currently build, and it worked just fine. I closed Unity and the application and went out to lunch. When i got back, and exported it again, it wouldn't open. It bounced in the dock about 3 times and closed. I tried exporting it again, and it still wouldn't open! D:

Is this a problem on my end? Or is it Unities problem? One extra bit of information, after I tried opening it about 5 times, a little window came up saying: "The item could not be found"

Any help?