When I Google LSF-S58, I get a Sony Lens Hood, not a camera. Are you recording in HD or SD?
Have you used the Thunderbolt to Firewire convertor successfully on your computer with other devices?
Have you used the Thunderbolt port successfully with other Thunderbolt devices?
I don't know if this is applicable to your computer, but there is a Thunderbolt software update for 10.6.8 here:
However this time I am using Final Cut Express version 4.0.1 along with a Thunderbolt to Firewire adapter so it'll connect with my MAC Book Pro (Operating system OS X 10.6.8).
Help us out here ... why are you using a Thunderbolt-to-FW adapter? The 13" Mid-2010 MacBook Pro doesn't have a Thunderbolt port .. and I don't know of any camcorder that has a Thunderbolt interface.
If your camcorder really does have Thunderbolt, exactly what model is it?
I have a bookpro retina with thunderbolt ports and no firewire 400 or 800.
I have a mini-dv sony cam and bought a firewire 800 cable with a Thunderbolt adapter to connect the cam to my bookpro and download some videos from it, yet no response from the bookpro at all. It doesnt recognize it completely.