Uninstall Ghostscript that comes with MacTex.

uninstall-ghostscript.sh

#!/usr/bin/env bash

# Copyright (c) 2015, 2020, and 2021 by Greg Werbin.
#
# Permission to use, copy, modify, and/or distribute this software for any purpose with
# or without fee is hereby granted, provided that the above copyright notice and this
# permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED “AS IS” AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
# SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT
# SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
# OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH
# THE USE OR PERFORMANCE OF THIS SOFTWARE.

# The MacTex website (https://www.tug.org/mactex/uninstalling.html) says it's
# "difficult" to uninstall Ghostscript, as installed by MacTex.
# 
# Their suggestion is to "Open the MacTeX-2015 install package and select 'Show Files'
# from the resulting 'File' menu of Apple's installer", and then "find files related to
# Ghostscript and remove them."
#
# This script is an attempt to automate that process. It prints the names of the deleted
# files, and moves the files to the user's Trash. This can help you roll back the
# effects of the script in case something goes wrong.
#
# Note that this requires write access to the `/tmp` directory on your computer.
#
# Note also that different versions of MacTex might require changes to this script.
#
# Example usage:
#  1) You saved `mactex-20150613.pkg` in `~/Downloads`, and used that to install MacTex.
#  2) Run `bash uninstall-ghostscript.sh ~/Downloads/mactex-20150613.pkg`
#
# These files were removed from my system when I used this tool:
#  /usr/local/bin/dvipdf
#  /usr/local/bin/eps2eps
#  /usr/local/bin/font2c
#  /usr/local/bin/gs-X11
#  /usr/local/bin/gs-X11-64Bit
#  /usr/local/bin/gs-X11-Yosemite
#  /usr/local/bin/gs-noX11
#  /usr/local/bin/gs-noX11-64Bit
#  /usr/local/bin/gs-noX11-Yosemite
#  /usr/local/bin/gsbj
#  /usr/local/bin/gsdj
#  /usr/local/bin/gsdj500
#  /usr/local/bin/gslj
#  /usr/local/bin/gslp
#  /usr/local/bin/gsnd
#  /usr/local/bin/lprsetup.sh
#  /usr/local/bin/pdf2dsc
#  /usr/local/bin/pdf2ps
#  /usr/local/bin/pf2afm
#  /usr/local/bin/pfbtopfa
#  /usr/local/bin/pphs
#  /usr/local/bin/printafm
#  /usr/local/bin/ps2ascii
#  /usr/local/bin/ps2epsi
#  /usr/local/bin/ps2pdf
#  /usr/local/bin/ps2pdf12
#  /usr/local/bin/ps2pdf13
#  /usr/local/bin/ps2pdf14
#  /usr/local/bin/ps2pdfwr
#  /usr/local/bin/ps2ps
#  /usr/local/bin/ps2ps2
#  /usr/local/bin/unix-lpr.sh
#  /usr/local/bin/wftopfa
#  /usr/local/share/man/de/man1/dvipdf.1
#  /usr/local/share/man/de/man1/font2c.1
#  /usr/local/share/man/de/man1/gsnd.1
#  /usr/local/share/man/de/man1/pdf2dsc.1
#  /usr/local/share/man/de/man1/pdf2ps.1
#  /usr/local/share/man/de/man1/printafm.1
#  /usr/local/share/man/de/man1/ps2ascii.1
#  /usr/local/share/man/de/man1/ps2pdf.1
#  /usr/local/share/man/de/man1/ps2ps.1
#  /usr/local/share/man/de/man1/wftopfa.1
#  /usr/local/share/man/man1/dvipdf.1
#  /usr/local/share/man/man1/font2c.1
#  /usr/local/share/man/man1/gs.1
#  /usr/local/share/man/man1/gslp.1
#  /usr/local/share/man/man1/gsnd.1
#  /usr/local/share/man/man1/pdf2dsc.1
#  /usr/local/share/man/man1/pdf2ps.1
#  /usr/local/share/man/man1/pf2afm.1
#  /usr/local/share/man/man1/pfbtopfa.1
#  /usr/local/share/man/man1/printafm.1
#  /usr/local/share/man/man1/ps2ascii.1
#  /usr/local/share/man/man1/ps2epsi.1
#  /usr/local/share/man/man1/ps2pdf.1
#  /usr/local/share/man/man1/ps2pdfwr.1
#  /usr/local/share/man/man1/ps2ps.1
#  /usr/local/share/man/man1/wftopfa.1
#
# And finally the directory:
#  /usr/local/share/ghostscript

move_to_trash() {
  # Move a file to the MacOS "Trash".
  # If the operation fails (e.g. the file is missing), an error message is emitted.
  command mv -v "$1" ~/.Trash \
    || >&2 echo "Failed to remove file or directory: $1"
}

uninstall_ghostscript () {
  # `pkgutil --bom` extracts any BOM ("bill of materials") files from the package
  # and emits its location. We only need `local.pkg`.
  # NOTE: This filename might change in newer versions of MacTex.
  bom_usr_local="$( pkgutil --bom $1 | fgrep local.pkg )"

  # 1) `lsbom -s f` lists the paths of the files in the BOM.
  # 2) Filter out the `ghostscript` directory (we will remove it only once everything else is gone).
  # 3) Replace the `.` prefix with the proper installation prefix: `/usr/local`.
  # 4) For each filename, move the file to Trash.
  lsbom -s -f "$bom_usr_local" \
  | fgrep -v ghostscript \
  | sed 's_^\._/usr/local_' \
  | while read filename; do 
      move_to_trash "$filename"
    done

  # Finally, remove the `ghostscript` directory itself.
  move_to_trash /usr/local/share/ghostscript
}

uninstall_ghostscript "$@"

@gwerbin the reason for the first change is that I tested the command pkgutil --bom with the latest MacTex.pkg The MacTeX-2021 Distribution, and found that there's no longer any pkg match pattern local.pkg in MacTex.pkg, so I change it to grep -F Ghostscript to find the files.

⋊> pkgutil --bom MacTeX.pkg
/tmp/MacTeX.pkg.boms.BhgSgg/Ghostscript-9.53.3-Start.pkg/Bom
/tmp/MacTeX.pkg.boms.BhgSgg/Ghostscript-9.53.3-libgs-Start.pkg/Bom
/tmp/MacTeX.pkg.boms.BhgSgg/GUI-Applications-Start.pkg/Bom
/tmp/MacTeX.pkg.boms.BhgSgg/TeXLive-2021-Start.pkg/Bom

⋊> pkgutil --bom MacTeX.pkg | grep -F local.pkg

⋊> pkgutil --bom MacTeX.pkg | grep -F Ghostscript
/tmp/MacTeX.pkg.boms.moSDab/Ghostscript-9.53.3-Start.pkg/Bom
/tmp/MacTeX.pkg.boms.moSDab/Ghostscript-9.53.3-libgs-Start.pkg/Bom

In additional, the result of lsbom -s -f $bom_user_local | grep -F -v ghostscript return different results in my system. (no idea whether it's related to any system configuration) so I had to change the sed 's_^\._/usr/local_' to sed 's_^\.__' to extract the right path.

⋊> lsbom -s -f /tmp/MacTeX.pkg.boms.skzyZj/Ghostscript-9.53.3-Start.pkg/Bom | grep -F -v ghostscript
./._usr
./usr/._local
./usr/local/._bin
./usr/local/._share
./usr/local/bin/._dvipdf
./usr/local/bin/._eps2eps
./usr/local/bin/._gs-noX11
./usr/local/bin/._gsbj
./usr/local/bin/._gsdj
./usr/local/bin/._gsdj500
./usr/local/bin/._gslj
./usr/local/bin/._gslp
./usr/local/bin/._gsnd
./usr/local/bin/._lprsetup.sh
./usr/local/bin/._pdf2dsc
./usr/local/bin/._pdf2ps
./usr/local/bin/._pf2afm
./usr/local/bin/._pfbtopfa
./usr/local/bin/._pphs
./usr/local/bin/._printafm
./usr/local/bin/._ps2ascii
./usr/local/bin/._ps2epsi
./usr/local/bin/._ps2pdf
./usr/local/bin/._ps2pdf12
./usr/local/bin/._ps2pdf13
./usr/local/bin/._ps2pdf14
./usr/local/bin/._ps2pdfwr
./usr/local/bin/._ps2ps
./usr/local/bin/._ps2ps2
./usr/local/bin/._unix-lpr.sh
./usr/local/bin/dvipdf
./usr/local/bin/eps2eps
./usr/local/bin/gs-X11
./usr/local/bin/gs-noX11
./usr/local/bin/gsbj
./usr/local/bin/gsdj
./usr/local/bin/gsdj500
./usr/local/bin/gslj
./usr/local/bin/gslp
......

Thanks @Tsingyi! It looks like they changed how the paths are defined. Did you look in the 2nd "Ghostscript" BOM? Maybe files from both BOMs should be removed.

Did you look in the 2nd "Ghostscript" BOM?

@gwerbin I didn't check it carefully, just removed both in the script. Since I just want all the files related to ghostscript deleted in my system.

How to give the write access to the /tmp directory on my computer? I'm using a Mac with apple silicon.

I am not familiar with pkgutil, but I am wondering, can I just first pkgutil --pkgs | grep -i ghost to find packages might be ghostscript installation, and then for each packages, I type pkgutil --files the-package-name, and then delete the outputed filenames one by one?