The URL of the file the window represents.
- macOS 10.5+
When the URL specifies a path, the window shows an icon in its title bar, as described in Table 1.
Specifies a nonexistent file
Specifies an existent file
Specific for the file’s type
You can customize the file icon in the title bar with the following code:
When the URL identifies an existing file, the window’s title offers a pop-up menu showing the path components of the URL. (The user displays this menu by Command-clicking the title.) The behavior and contents of this menu can be controlled with