mynav.py doesn't work in ida7.0 with macOS

[3xp10it]

I download mynav and try to use it in ida7.0 with macOS,find mynav.py doesn't work(doesn't generate the edit|plugin|xxx items),but mybrowser.py and myexport.py works well.

I try to debug it,and find the reason it doesn't work is below code:

        os.system("echo 666 > /tmp/111")
        idaapi.add_menu_item("Edit/Plugins/", "-", None, 0, self.doNothing, ())
        os.system("echo 555 > /tmp/111")

my /tmp/111 file's content is 666,but not 555,that's to say,idaapi.add_menu_item seems not work.

I make mynav.py work in ida7.0 now.here