Macintosh Can't log in

Hello

A few hours ago I was afk at GS2 on the rope. When I came back, there was no lag (someone was grinding and the frames were ok) and when I changed channels, the game crashed. Since then, when I relog, everything works fine until I select my character. It stays there loading and nothing happens. I have two chars on that acc and neither work. If I press back while it is loading, it takes me back to the World screen, but no worlds appear, and if I press back again, it crashes.

I still can log on my other acc though.

Any help?