Karabiner configuration for fixing NumLock behaviour in macOS

private.xml

<?xml version="1.0"?>
<root>
    
    <!--
     private.xml for Karabiner
     download at https://pqrs.org/osx/karabiner 
     //-->
    
    <devicevendordef>
        <vendorname>BELKIN</vendorname>
        <vendorid>0x05a4</vendorid>
    </devicevendordef>
    
    <!-- 
     This item will map the numlock key of a Belkin USB
     numpad to the native NumLock function in OS X. It
     will make sure that key presses on the numpad register
     as expected (for example in Team Fortress 2)
     //-->
    
    <item>
        <name>Map Belkin NumPad NumLock key to OSX NumLock function</name>
        <identifier>private.belkin_numpad_numlock_to_mac_numlock</identifier>
        <device_only>
            DeviceVendor::BELKIN,
            DeviceProduct::ANY
        </device_only>
        <autogen>__KeyToKey__ KeyCode::KEYPAD_CLEAR, KeyCode::VK_IOHIKEYBOARD_TOGGLE_NUMLOCK</autogen>
    </item>

    <!--
     The same as the one above, but now generic for any
     numlock key presses (and hence not bound to belkin
     only numpads).
     //-->

    <item>
        <name>Map Any NumLock key to OSX NumLock function</name>
        <identifier>private.pc_numlock_to_mac_numlock</identifier>
        <autogen>__KeyToKey__ KeyCode::KEYPAD_CLEAR, KeyCode::VK_IOHIKEYBOARD_TOGGLE_NUMLOCK</autogen>
    </item>

</root>