I have a command-line executable in Xcode.
I am using Xcode 5.1. In the \"Scheme Editor\" for the project under \"Options\" there is an option for \"Working Directory\".
You can use Xcode build setting variables such as PROJECT_DIR, e.g. setting your working directory to $PROJECT_DIR/.. will make it equal to the parent directory of your project directory.
PROJECT_DIR
$PROJECT_DIR/..