MAYA: Toggle MainWindow menubar to be native or not. Moves the menubar into the mainwindow on OSX. This may be useful while recording and scaling your window to fit a certain size.

toggle_menubar_native.py

import maya.OpenMayaUI as OMUI

from PySide import QtCore
from PySide import QtGui

from shiboken import wrapInstance

def maya_main_window():
    mainWindowPtr = OMUI.MQtUtil.mainWindow()
    return wrapInstance(long(mainWindowPtr), QtGui.QMainWindow)
    
def toggle_menubar_native():
    mainWindow = maya_main_window()
    menubar = mainWindow.menuBar()
    menubar.setNativeMenuBar(not menubar.isNativeMenuBar())
    
toggle_menubar_native()

This actually breaks the menu's so far.. Not so sure why that is.. 🎱