I presume that we all know Linux and know the benefits of having a distribution with a proper package management. Now, macOS can do this as well.

MacOS has the AppStore, but you will hardly find any open-source software there. Even if there were any, well, I do not know how to easily automate an AppStore-purchase from a script.

There are quite some package managers for MacOS. I prefer the homebrew website, because it is not just good for command-line-tools. Complete applications can be installed with it.

In future I will post an example shell-script installing homebrew and setting up my MacOS. For now, pleaser refer to the homebrew website for details.