Posting the links to application I had mentioned during Q/A
Point it at directory of your LESS files, or individual ones.
You'll need to install Ruby (http://rubyforge.org/...)
then install LESS: gem install Less
and then either setup a Watch:
$ lessc style.less --watch
This is essentially the same thing the LESS App for OSX does, but without the requirement of installing Ruby.
Or you might integrate into an IDE when a file is saved, have it call the lessc command with the file your working on as an argument.