Ok. 1) I went into Flex Builder and installed the flash player that comes in Flex Builder 3/Player/mac
After I did this, the project would compile and run without giving me any errors, but it never updated (for instance, I changed the background color, and it would 'compile and run', but the background color never changed, i did it with multiple different variables, but it was as if it was not actually updating the swf) 2) I decided to just do what you said, so I ran the uninstall flash player 3) I installed Flash Player 10, and I am getting that error, as well as a new error that says "/users/...../public/bin/MyProject.swf The SWF application file does not contain required debugging Information. You might need to edit your project settings or recreate your project." It is so frustrating.