Bug 73729 [Workbench] [Mac] Dual preferences menu items
On Mac OS X, the preferences menu item appears in the Eclipse menu. This is correct. However, the same menu item that does the same thing also appears in the Window menu, which is correct on other platforms but not the Mac. It should be removed from the Window menu.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
private IWorkbenchAction saveAction;
    private IWorkbenchAction saveAllAction;
    private IWorkbenchAction newWindowAction;
    
    private IWorkbenchAction newEditorAction;
    private IWorkbenchAction helpContentsAction;
    private IWorkbenchAction helpSearchAction;
	
    private IWorkbenchAction dynamicHelpAction;
    
    private IWorkbenchAction aboutAction;
    private IWorkbenchAction openPreferencesAction;
    private IWorkbenchAction saveAsAction;
    private IWorkbenchAction hideShowEditorAction;
    private IWorkbenchAction savePerspectiveAction;
    private IWorkbenchAction resetPerspectiveAction;
    private IWorkbenchAction editActionSetAction;
    private IWorkbenchAction closePerspAction;
    private IWorkbenchAction lockToolBarAction;
    private IWorkbenchAction closeAllPerspsAction;
    private IWorkbenchAction showViewMenuAction;
    private IWorkbenchAction showPartPaneMenuAction;
    private IWorkbenchAction nextPartAction;
    private IWorkbenchAction prevPartAction;
    private IWorkbenchAction nextEditorAction;
    private IWorkbenchAction prevEditorAction;
    private IWorkbenchAction nextPerspectiveAction;
    private IWorkbenchAction prevPerspectiveAction;
    private IWorkbenchAction activateEditorAction;
    private IWorkbenchAction maximizePartAction;