Issue downloading the game on Mac via Steam

Hello everyone, as per title, I'm having troubles properly installing and thus creating the .esm file to load onto OpenMW.

I followed each step of this guide (https://openmw.readthedocs.io/en/latest/manuals/installation/install-game-files.html#example-suite) and when it comes to downloading the game via the .csm file, the only files in the directory are Morrowind.ini, a Saves folder and another file, totaling 5,6 MB of storage.

Could anybody help me? Thanks in advance!