MacBook 12" A1534 No Keyboard in sysinstall

I've seen that reported a few times (for some machines, not necessarily MacBooks). Sometimes this problem only shows up during install.
If it is possible to plug in a usb keyboard and you have one available, you could try that and see if that would help you get a working keyboard for the installation.
So progress... USB keyboard works, however the FreeBSD installer doesn't see the internal disk, only the USB thumb drive.