[Yossarian]

Yes, I installed the “Xcode Command-line tools” at some point - that must have installed Perl there.

I also have an install of it over in /opt, since I use MacPorts to get a lot of standard-issue UNIX packages. (Using MacPorts versions is also good to never monkey with the versions of the standard UNIX tools that Apple depends on the exact behavior of. You can upgrade MacPorts versions of tools, Apple will upgrade their tools only when needed.)

I suppose we need to worry about installs going on there, as well.

[Swordmaker]

Yes, I installed the “Xcode Command-line tools” at some point - that must have installed Perl there.

Bingo.

Only if you are using PERL, I think. . . and careless about what you download.