It will be better to move discussion on dedicated post.
I have a problem with connection MotifXS8 to Macbook via Firewire.
You should have a FW cable that is 6-pin to 9-pin.
This should connect to a 9-pin to Thunderbolt adapter.
I have exactly such FW cable (400-800 pin, made by Aliexpress) and Thunderbolt adapter (made by Apple).
I cant install IEEE1394 firmware
Of course, NOT. You have to establish a connection BEFORE you can even know if you need this firmware update.
I really understand that point.
Could you explain how it may be: connection did't establish but I see XS in hardware report and even can manage controls by using XS Editor tool?