is there any way to use this with a 64 bit system, im using a mac and its only available in 64 bit

Can anyone help me out? i have multiple versions of su, but in each one the same error message pops up the second i open skutchup. I cant get to any of the tools, its like its not installed, but i have uninstalled and reinstalled it multipule times and nothing seems to work. Any help would be appreciated, thanks.

Does any one know how to make hollow objects or how to attach objects together in Sketchy Physics without it creating an impenetrable box around them? I am trying to make a pipe that is hollow, or a moveable cart that a ball will fall into, but i can't figure out how to hake hollow objects, or how to attach things together, with out making them into a group. This would help me greatly thanks. Someone please help!