replace tilde to shift key in macbook
You can use a private.xml such as this:

&lt;?xml version="1.0"?&gt;
&lt;root&gt;
  &lt;item&gt;
    &lt;name&gt;TildeToShift&lt;/name&gt;
    &lt;identifier&gt;TildeToShift&lt;/identifier&gt;
    &lt;autogen&gt;__KeyToKey__ KeyCode::BACKQUOTE, KeyCode::SHIFT_L&lt;/autogen&gt;
  &lt;/item&gt;
&lt;/root&gt;