From Windows

Pack the installer to a folder with my script.
  1. Put the PackAppWin.py (from MakeInstallmacOS) into the downloaded macOS Installer files folder (i.e.: gibMacOS/macOS Downloads/publicrelease/xxx-xxxxx blah blah blah)

  2. Double click PackAppWin.py

  3. Choose P

  4. The script should be packing your files to a new folder call SharedSupport

  5. When it is done, proceed to next part