Macbook pro 2013 disable trackpad input completely
The track pad is a USB device so the only way to disconnect it is to physically disconnect it.  However, you may have to disconnect the entire top case rendering your keyboard disconnected as well.

If you're having issues with the track pad, your best option is to replace it.  Disabling it by deleting kexts only lasts until the subsequent update.  With Catalina, you'll need to disable security (SIP) to delete the kexts which is counterproductive. 


MacBook Pro Trackpad Suddenly Stopped Working Completely
2015 13&quot; MacBook Pro Trackpad and Keyboard stop working
Trackpad and keyboard of MacBook Pro unresponsive