Unknown option on commandline: --gui

This message is generated by the snowfall package when loading the OpenMx library in the OS X graphical user interface. It's a harmless message, and users should just ignore it. I've submitted a 3 line patch to the maintainer of the snowfall package, so we hope this message will go away in the next release of snowfall. If you want to download the snowfall source yourself (version 1.70), I've attached the patch to this post.