I am new to the android development and when i create a new project using eclipse juno on mac OSx i got an error at runtime Failed to instantiate com.android.menubar.int
It appears to me the com.android.menubar.internal.MenuBarEnhancerCocoa is only there to make the android app feel nicer if it's run directly. Then preferences and about will be in the application menu. If you run the android sdk manager from eclipse, then eclipse will take over that part of the application menu.