I don't have a mac so not sure if this will work or not:
Code:
Sub ScratchMacro()
'A basic Word Macro coded by Gregory K. Maxey
Dim oSection As Section
Dim lngIndex As Long, lngShape As Long
For Each oSection In ActiveDocument.Sections
For lngIndex = 1 To 3
For lngShape = oSection.Headers(lngIndex).Shapes.Count To 1 Step -1
oSection.Headers(lngIndex).Shapes(lngIndex).Delete
Next lngShape
Next lngIndex
Next oSection
lbl_Exit:
Exit Sub
End Sub