I want to connect my old camera with a Firewire 400 connector to my new(ish) Mac mini. Does anyone know if you can a Firewire 400 connector to 2.0 USB adapter?
If not, can I get a Firewire to a Thunderbolt adapter?
The IEEE 1394b serial interface, better known as FireWire® 800, doubles the speed of the older FireWire 400. It uses a newer 9-pin "beta" connector, which is incompatible with
www.monoprice.com
That is the smaller Firewire connector that would often be found on a camera (also known as a 4-pin)
If your camera has the larger 6-pin connector, then you could use this cable - https://www.monoprice.com/product?p_id=3542
(the description pages show a pretty clear picture of the cable ends, should help you be sure of what you might buy)
Or, if you really do need to use your thunderbolt port (maybe your Firewire 800 port is already in use), there's still Apple's Thunderbolt to Firewire 800 adapter. No longer sold by Apple, but not hard to find: https://eshop.macsales.com/item/Apple/MD464LLA/
(I give you permission to stop looking for a USB to Firewire adapter that works. )