Multiple errors upon starting sketchyphysics.

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What steps will reproduce the problem?
1. Downloaded Sketchup 8 on a mac with 10.6 operating system
2. Downloaded Sketchyphysics and moved to drivers folder 
3.

What is the expected output? What do you see instead?
Seeing sketchyphysics load when I start sketchup. This is what I see instead 
"Error Loading File ChildFrame.rb
uninitialized constant WxError Loading File downloader.rb
no such file to load -- net/httpError Loading File downloader1.rb
no such file to load -- socketError Loading File input.rb
no such file to load -- sketchyphysics3/virtualkeycodes.rbError Loading File 
JointTool.rb
can't convert nil into StringError Loading File midi.rb
can't convert nil into StringError Loading File Newton.rb
can't find the symbol `init'Error Loading File PrimsTool.rb
can't convert nil into StringError Loading File SketchyPhysicsTool.rb
can't convert nil into StringError Loading File SketchyReplay.rb
can't convert nil into StringError Loading File SketchySolids.rb
no such file to load -- SketchyPhysics3/PrimsTool.rbError Loading File Sound.rb
can't find the symbol `SDL_Init'"
What version of the product are you using? On what operating system?

Sketchup 8  Sketchyphysics 3.1  Mac OS 10.6.8
Please provide any additional information below.
I'm not a programmer nor have any experience programming so please be gentle 
and slow with the explanation.  THANK YOU AND PLEASE HELLLLLPPPPP!!!!!!

Original issue reported on code.google.com by jessena...@gmail.com on 20 May 2013 at 12:45