Try the Cnet Camcorder and MacOS forums too.
My thought is the usual failed firewire cable or port. For this I have to truck down to the Apple store to let them show me the port and cable working.
yesterday I experienced a weird problem for the first time since I bought this wonderful HDR-XR520: my Mac won't detect my camera anymore. I tried to fix it, but with no success. Only two days ago iMovie would detect automatically... what's happened?
PLEASE ANSWER ASAP, I REALLY NEED TO GET IT FIXED!