This is the latest version of the UNIX script: Debloat script. It was updated when PolecatEZ updated the debloat script for removing stock IVA textures.
It SHOULD work on Mac with the same instructions for Linux.
Paste the contents of the pastebin link into a file in your /Gamedata folder. Call it debloat.sh.
In a terminal, cd into the /Gamedata folder, and run: chmod 700 [file]
Now execute the file with: sudo [filename]
Now follow the rest of PolecatEZ's directions.
I'm sure there are other ways of doing this, but I don't use a Mac so I'm giving the most straightforward directions to running a script on both Mac & Linux.