Update: I solved it by leaving c4dOctane_R17 file instead of R18 (as my C4D version).
Now it's crushing. This battle is not over

Hey,
What are you trying there? Running the plugin file as an application?
I was trying that, yes.
First, I tried just to leave all the files in Cinema 4D folders (/plugins/c4doctane), nothing happened. So, then I looked at the manual here https://docs.otoy.com/#cinema-4d-v3-getting-started ...

Hello,
It is mostly Mac OS issue but I've tried everything I could think of, so I will ask it here too.
I'm trying to install c4doctane plugin, and it gives me:
/Applications/MAXON/CINEMA4DR18/plugins/c4doctane/c4dOctane_R18.dylib ; exit;
-bash: /Applications/MAXON/CINEMA4DR18/plugins/c4doctane ...