I'm running 10.11.6 I can't get passed the permission issues. Neither the terminal window or changing anything in the "get info" section of the file works I have the file in the rocksmith2014 app like you suggest but I continue to receive "no such file or directory" when I type it into terminal. I'm typing chmod u+x /users/craigdengate/Library/Application Support/Steam/steamapps/common/Rocksmith2014/RUN_PATCH_RS.command Note - I'm a complete novice when it comes to this, so the u+x thing, I've also tried craigdengate+execute, u+execute, craigdengate+x and as many varying ways as I can think of! LOL