try it and all it does is freeze and give a black screen?
and when i tried to build an example project to see if that would work it only ran part of the project and quit halfway through.
any suggestions?
Either you have an error in your script, or it is a bug. Have you reported a bug yet? Go to Start → Unity → Report a Bug or in Mac I think it is Unity Application Folder → Report a Bug. I’m not sure about Mac OS because I don’t use that.
Probably the first place to start is to create a new project that has nothing but a camera in it. Build that (you don’t say what platform you are targeting) and see if you can run that. You should get the blue default camera background appear. If this does not work, then look into the log file that gets created and see if Unity is telling you what is wrong. If this project does give you the expected result, add some game objects and some simple scripts and see if that works. Then slowly re-create your project and test along the way. When you find something that stops your game from working, submit that project as a bug.