I have very cursory knowledge in any of this. but do want to back up my blogs 
and want to utilize your product. But what does this mean in regards to
macintosh? if you could spell it out i have no idea where to put the language,
why, and all that stuff. thanks, jojo

A: Yes, using the original sources:

tar xvfz httrack-*.tar.gz
cd httrack-*
./configure --prefix=/usr/local && make && make install
/usr/local/bin/httrack

But there are no official binaries, because of a lack of time