I have developed my first macintosh app, a mini piano, i know it's very simple but other than this i have found some differences between the run version inside Fusion and the compiled one, fonts and buttons are really different you can see by the images. Any advice? i'm under Mac OS X 11.11.6 El Capitan.
Fusion image (this is the windows version but less or more it the same)
Fusion Mac Compiled Version