There are locations outside of your home dir where one can find 'his' files on
any *nix-like OS. /var, /tmp among them.
I tried installing Ddt on my MacBook but things went broken with
License::Software module.
Yet, anyway, carefully looking into your output I see that things are broken at
perl6-users:
I have:
macOS Mojave
Version 10.14.4
MacBook Pro (Retina, 15-inch, 2015)
Today, I downloaded and installed:
https://rakudo.org/latest/star/macos
into my normal user account per the built-in instructions (including
setting PATH).
Perl 6 seems to work: