Potresti usare i tasti del tastierino numerico sotto fn? Ad esempio, fn-J è il tastierino numerico 1 e fn-K è il tastierino numerico 2.
Modifica: potresti utilizzare anche un file private.xml private.xml come questo con KeyRemap4MacBook:
<?xml version="1.0"?>
<root>
<item>
<name>test</name>
<identifier>test</identifier>
<inputmode_only>CHINESE_SIMPLIFIED, CHINESE_TRADITIONAL</inputmode_only>
<autogen>__KeyToKey__ KeyCode::KEY_0, VK_SHIFT, KeyCode::KEYPAD_0</autogen>
<autogen>__KeyToKey__ KeyCode::KEY_1, VK_SHIFT, KeyCode::KEYPAD_1</autogen>
<autogen>__KeyToKey__ KeyCode::KEY_2, VK_SHIFT, KeyCode::KEYPAD_2</autogen>
<autogen>__KeyToKey__ KeyCode::KEY_3, VK_SHIFT, KeyCode::KEYPAD_3</autogen>
<autogen>__KeyToKey__ KeyCode::KEY_4, VK_SHIFT, KeyCode::KEYPAD_4</autogen>
<autogen>__KeyToKey__ KeyCode::KEY_5, VK_SHIFT, KeyCode::KEYPAD_5</autogen>
<autogen>__KeyToKey__ KeyCode::KEY_6, VK_SHIFT, KeyCode::KEYPAD_6</autogen>
<autogen>__KeyToKey__ KeyCode::KEY_7, VK_SHIFT, KeyCode::KEYPAD_7</autogen>
<autogen>__KeyToKey__ KeyCode::KEY_8, VK_SHIFT, KeyCode::KEYPAD_8</autogen>
<autogen>__KeyToKey__ KeyCode::KEY_9, VK_SHIFT, KeyCode::KEYPAD_9</autogen>
</item>
</root>