For those who wonder, the directory was initially found as a subdirectory of a Steam game (Factorio, release 0.17.0). The original path of the directory was ~/Library/Application Support/Steam/steamapps/common/Factorio/factorio.app/Contents/data/base/campaigns/demo/locale/ru
. The part from demo
downwards caused the game to not start properly (it was, apart from the directories, empty, but the game tried to pick up some non-existing file from the demo
directory and crashed). Moving the directory away made the game playable, but I later discovered that the bottom-most ru
directory could not be deleted. This is the directory that I then renamed strange
and that I refer to throughout this question.
I have submitted feedback to Apple about this, but I'm no Apple developer so I can't submit a formal bug report.