I don't know that I'd worry about MacOS. It is old; it hasn't shipped as the primary OS since 2001. All the major apps have been converted/updated to OS X, which is a Unix under the hood. As a former longtime MacOS user, I have completely abandoned it. In fact, I can't remember the last time I've used it, even in the "Classic" emulation mode under OS X. Certainly not since 2002.

Now, while this might be against the philosophy of open source/Perl/CPAN/etc, you might want to ask yourself if it's worth the time and effort.