Karabiner Configuration to Remap Surface Ergonomic Keyboard Alt and Windows Keys for Mac

private.xml

<?xml version="1.0"?>
<root>
  <devicevendordef>
      <vendorname>Microsoft</vendorname>
      <vendorid>0x045e</vendorid>
  </devicevendordef>

  <deviceproductdef>
      <productname>SurfaceErgonomic</productname>
      <productid>0x0817</productid>
  </deviceproductdef>

  <item>
      <name>Remap Surface Ergonomic Alt to Command</name>
      <appendix>This maps the Microsoft Surface Ergonomic's ALT Key to Command.</appendix>

      <identifier>surface_ergonomic.alt_to_command</identifier>
    
      <device_only>DeviceVendor::Microsoft,
      DeviceProduct::SurfaceErgonomic</device_only>

      <autogen>
          --KeyToKey--
          KeyCode::OPTION_L,

          KeyCode::COMMAND_L
      </autogen>
      <autogen>
          --KeyToKey--
          KeyCode::OPTION_R,

          KeyCode::COMMAND_R
      </autogen>
  </item>
  <item>
      <name>Remap Surface Ergonomic Windows to Option</name>
      <appendix>This maps the Microsoft Surface Ergonomic's Windows Key to Option.</appendix>

      <identifier>surface_ergonomic.windows_to_option</identifier>

      <device_only>DeviceVendor::Microsoft,
      DeviceProduct::SurfaceErgonomic</device_only>

      <autogen>
          --KeyToKey--
          KeyCode::COMMAND_L,

          KeyCode::OPTION_L
      </autogen>
      <autogen>
          --KeyToKey--
          KeyCode::COMMAND_R,

          KeyCode::OPTION_R
      </autogen>
  </item>
</root>