When I recently updated my mac laptop to 10.8.5 ("Mountain Lion", I think?), I found that the Perl upgrade that came with it was (of course) not able to run a lot of my scripts, because a lot of cpan modules had to be reinstalled into the new perl lib directories.

And in order to get those modules installed, I had to install the OSX Xcode package, which includes things like "make" and so on. Are you sure that "make" is currently available on your mac?