I want to find all of the (writable, local) file systems on the machine, not just the available space in a single directory.
If I understand you correctly, you want to know which filesystems are mounted where, so you can query those mount points with Filesys::Statfs, right? I think Sys::Filesystem does that (though it's unclear to me whether it actually supports OS-X)

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: Cross-platform disk space checking by Joost
in thread Cross-platform disk space checking by eb710

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