Originally Posted by jackie_w
I'm not a Mac user so I can't tell you specific Mac commands. I believe it's something to do with directories beginning with a dot (eg .kobo) being 'hidden'. So you need to find the Mac way to 'un-hide' them.
Perhaps another Mac-user will be able to tell you something more specific.
Thank you Jackie and Peter, the problem was in hidden files
I just went to Go to Folder and typed .kobo and voila, dictionary folder was there