This might be due to using an AppleUSBVideoSupport file from Snow Leopard. More info:
$ ift-extract -a ~/AppleUSBVideoSupport
** (ift-extract:4708): WARNING **: Unknown driver. Please report it to https://bugs.launchpad.net/isight-firmware-tools/+filebug with machine description and Mac OS X version.
$ md5sum AppleUSBVideoSupport 602f49036c0ccc775f98b0374bad29a7 AppleUSBVideoSupport
This might be due to using an AppleUSBVideoSu pport file from Snow Leopard. More info:
$ ift-extract -a ~/AppleUSBVideo Support
** (ift-extract:4708): WARNING **: Unknown driver. Please report it to https:/ /bugs.launchpad .net/isight- firmware- tools/+ filebug with machine description and Mac OS X version.
$ md5sum AppleUSBVideoSu pport 75f98b0374bad29 a7 AppleUSBVideoSu pport
602f49036c0ccc7