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 minimizePartAction;
    private IWorkbenchAction switchToEditorAction;
    private IWorkbenchAction openEditorDropDownAction;
    private IWorkbenchAction backwardHistoryAction;
    private IWorkbenchAction forwardHistoryAction;
    
    private IWorkbenchAction undoAction;
    private IWorkbenchAction redoAction;
    private IWorkbenchAction cutAction;
    private IWorkbenchAction copyAction;
    private IWorkbenchAction pasteAction;
    private IWorkbenchAction deleteAction;
    private IWorkbenchAction selectAllAction;
    private IWorkbenchAction findAction;
    private IWorkbenchAction printAction;
    private IWorkbenchAction revertAction;
    private IWorkbenchAction refreshAction;
    private IWorkbenchAction propertiesAction;
    private IWorkbenchAction quitAction;
    private IWorkbenchAction moveAction;
    private IWorkbenchAction renameAction;
    private IWorkbenchAction goIntoAction;
    private IWorkbenchAction backAction;
    private IWorkbenchAction forwardAction;
    private IWorkbenchAction upAction;
    private IWorkbenchAction nextAction;
    private IWorkbenchAction previousAction;
    
    private IWorkbenchAction openWorkspaceAction;