Puoi utilizzare KeyRemap4MacBook ad esempio per l'opzione mappa, passare all'opzione-F19 e al control-shift per controllare-F19:
<?xml version="1.0"?>
<root>
<item>
<name>test</name>
<identifier>test</identifier>
<autogen>__KeyOverlaidModifier__ KeyCode::SHIFT_L, ModifierFlag::OPTION_L | ModifierFlag::SHIFT_L | ModifierFlag::NONE, KeyCode::SHIFT_L, ModifierFlag::OPTION_L, KeyCode::F19, ModifierFlag::OPTION_L</autogen>
<autogen>__KeyOverlaidModifier__ KeyCode::SHIFT_R, ModifierFlag::OPTION_R | ModifierFlag::SHIFT_R | ModifierFlag::NONE, KeyCode::SHIFT_R, ModifierFlag::OPTION_R, KeyCode::F19, ModifierFlag::OPTION_L</autogen>
<autogen>__KeyOverlaidModifier__ KeyCode::SHIFT_L, ModifierFlag::CONTROL_L | ModifierFlag::SHIFT_L | ModifierFlag::NONE, KeyCode::SHIFT_L, ModifierFlag::CONTROL_L, KeyCode::F19, ModifierFlag::CONTROL_L</autogen>
<autogen>__KeyOverlaidModifier__ KeyCode::SHIFT_R, ModifierFlag::CONTROL_R | ModifierFlag::SHIFT_R | ModifierFlag::NONE, KeyCode::SHIFT_R, ModifierFlag::CONTROL_R, KeyCode::F19, ModifierFlag::CONTROL_L</autogen>
</item>
</root>
Quindi modificare le scorciatoie per commutare le sorgenti di ingresso sull'opzione-F19 e control-F19.