You do however now need to tell all the users of your tutorial to go and install brew, then install coreutils and then to replace every use of "sort" with "gsor

You do however now need to tell all the users of your tutorial to go and install brew, then install coreutils and then to replace every use of "sort" with "gsort", etc. Running a docker container, regardless of what it does under the hood, is extremely easy on a mac. You install a program then do "docker run ...".