DC #-Symbol Error

[jim_foltz]

It looks like you are a victim of Mac Smart Quotes.

This topic has some tips for turning them off:

Dynamic component runtime error on MAC

I was having this same problem with SketchUp my AirBook. After considerable head scratching, I determined that, for me, the “Invalid entity to animate” error was caused by smart quotes, which are enabled by default on OS X. Try turning off smart quotes in System Preferences → Keyboard → Text → uncheck “Use smart quotes and dashes.”