Terminal.appとかiTerm2とかで、C-[で英数モードにする。 ref: http://r7kamura.hatenablog.com/entry/20110217/1297910068

private.xml

<?xml version="1.0"?>
<root>
  <list>
    <item>
      <name>LeaveInsMode with EISUU(Terminal)</name>
      <identifier>private.app_terminal_esc_with_eisuu</identifier>
      <only>TERMINAL</only>
      <autogen>--KeyToKey-- KeyCode::BRACKET_LEFT, VK_CONTROL, KeyCode::JIS_EISUU, KeyCode::BRACKET_LEFT, VK_CONTROL</autogen>
    </item>
  </list>
</root>