Game runs very slow in Mac Compiler

Hi

I have an issue with the compiler.

When I run in debug or play mode the game is incredibly slow and choppy.

However if I compile the game and run it in a browser it works just fine. It also works just fine if I use a windows machine in debug or play mode.

Do you have any idea why its slow in the Mac flash builder compiler but no where else (and of course how I can speed it up on my Mac)?

Im using 4.7 and starling.