Feral Heart

So the game starts properly and runs perfectly as well. My problem is, whenever I log in on a character that was left at (or sometimes, try to enter) Fluorite Plains or Bonfire Island, even Ficho Tunnel, this box will appear saying the game suddenly closed. I'm a mac user I believe many others (including Windows users) find this frustrating. Is there any way to avoid this? When I play FH I tend to close as many unused apps as possible, normally leaving FH, Spotify (rarely), Finder and Chrome.

Here's a screenshot of the box: http://puu.sh/k26Dy/96ea9e5a5a.png
You can clearly see the game was running perfectly, it even allowed me to appear/log in on Fluorite and enter Ficho for a small amount of time.