You can run this macro manually to apply Arabic style numbering to the Comment Text style (applies to the currently active document in Word):
Sub ModifyCommentStyle()
'Comment Text numbering macro created by MVP Stefan Blom
'Tested in Word for Windows
Dim s As Style
Dim lt As ListTemplate
On Error GoTo errhandler
Set lt = ActiveDocument.ListTemplates.Add(OutlineNumbered:=False)
With lt
.ListLevels(1).NumberStyle = wdListNumberStyleArabic
End With
Set s = ActiveDocument.Styles(wdStyleCommentText)
With s
s.LinkToListTemplate lt
End With
errhandler:
Exit Sub
End Sub
In Word for Windows, you can change the name of the macro from ModifyCommentStyle to
AutoOpen and the macro will run for every document that you open in Word. However, I am not sure if so-called auto macros are supported in Word for Mac.