Usage:
  ift-extract [OPTION...] - built-in iSight firmware extractor and patcher

Help Options:
  -h, --help                               Show help options

Application Options:
  -a, --apple-driver                       Path to the AppleUSBVideoSupport driver file.
  -d, --output-directory=/lib/firmware     Output firmware directory
  -f, --output-filename=isight.fw          Name of the output firmware file

AppleUSBVideoSupport driver is usualy found in /System/Library/Extensions/IOUSBFamily.kext/Contents/PlugIns/AppleUSBVideoSupport.kext/Contents/MacOS/ in your Mac OS X root volume.

If you have a non-working Apple driver file, please send it to https://bugs.launchpad.net/isight-firmware-tools/+filebug withmachine description and OS X version.
carla@carla-MacBook:~/Scaricati$