From Windows

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

  2. Run python3 <drag and drop here>

  3. Choose P.

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

  5. You will be asked for getting the 7z.exe location. It is located in C:\Program Files (x86)\7zip Drag and drop the 7z.exe to the window and press enter. The script should continue to run.

  6. When it is done, proceed to next part.