> **TL;DR:** To display the complete directory path at the top of the Finder window in OSX Lion, execute these commands in the terminal.

To display the complete directory path at the top of the Finder window in OSX Lion, execute these commands in the terminal:

```bash
defaults write com.apple.finder _FXShowPosixPathInTitle -bool YES
```

```bash
killall Finder
```

**Important:** Follow the syntax precisely, as Unix commands are case-sensitive.

This modification enables visibility of the full directory path in the Finder window's title bar, providing quick reference to your current location within the file system.