I tried to install this on OSX (10.12.1), it doesn't seem to handle tar.xz files well, when extracted using the (default) "Archive Utility", it produces a ".cpgz" file, which, when extracted, produces a ".tar.xz" file again.

I ended up extracting it using the "xz" utility

    brew install xz
    xz -d ./mac-portacle.tar.xz

Opening the Portacle.app file didn't work, starting it from the terminal gave me the following:

    dyld: Symbol not found: _iconv
      Referenced from: /usr/lib/libcups.2.dylib
      Expected in: /Users/koen/Downloads/portacle//usr/mac/lib//libiconv.2.dylib
     in /usr/lib/libcups.2.dylib
    /Users/koen/Downloads/portacle//emacs/mac/emacs.sh: line 51: 44458 Abort trap: 6               "$SCRIPT/bin/emacs" --name Portacle -T Portacle -q -l "$ROOT/config/emacs-init.el" "$@"