This is insane.

[LawnmoaitheGreat]

For some reason, FH opens, then AUTOMATICALLY closes and it has done this ever since it became UNRESPONSIVE and would not bring up the "Force Quit" option when i click-hold its icon.

(Also, I'm a mac user.)

[CeramicSoul]

http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=3251.0

Try this. Its the feral heart on mac update post. If the same thing happens try re-downloading.

[LawnmoaitheGreat]

http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=3251.0

Try this. Its the feral heart on mac update post. If the same thing happens try re-downloading.

It doesn't seem to have any information on this crash type.

[Wyldercat]

I'm not too great with Macs, but I do believe that these potential solutions are universal:
~Uninstalling and reinstalling
~(Whatever the Mac equivalent of troubleshoot is)
~Refreshing PC

[Bloo.]

Have you downloaded anything recently? A map, mod, preset, etc.?

Also, when you reinstall you have to make sure everything is deleted, every single file associated with FH.