You're using MacPort's install of Perl, instead of the OSX's default. Edit the shebang in /usr/local/bin/mosh to point to /url/bin/perl. Anyway, that did the t

You're using MacPort's install of Perl, instead of the OSX's default. Edit the shebang in /usr/local/bin/mosh to point to /url/bin/perl. Anyway, that did the trick for me.