kpsewhich is not found on Mac

[Timothy Reaves]

I've just install TexLive & LyX on a new OS install; when I open any file in 
LyX (the help files) I get errors that class files are not found.  They are 
indeed on my machine.  Looking at the debug messages, I see:
    sh: kpsewhich: command not found
However, the file is on my path:
    [/Applications ] which kpsewhich
    /usr/texbin/kpsewhich

So it seems that this is what is causing LyX to not be able to find the files.
Any ideas as to how to correct this?

Thanks.