The OS X Finder is a great tool to use for organizing your documents and projects into folder hierarchies; however, it is a bit limited. If you would like to save this hierarchy as a list in a file then the Finder and OS X does not provide these options. While the Finder does support printing a folder's listings by dragging a folder to a print queue, this is about the limit of the options for listing folder items.
One alternative to this is to use screenshots; however, these are static images in which items cannot be selected and copied, or otherwise managed.
Another alternative is to try using Automator, AppleScript, or shell scripts (including) to construct a workflow for this purpose; however, this can sometimes take a bit of development and testing, and be a daunting task especially for those who are not familiar with scripting languages.
Despite this, an easier option does exist with the free TextWrangler utility that is available for OS X from BareBones Software. One feature that TextWrangler supports is the ability to create a tab-indented hierarchical tree of a folder's contents and display it in a text document by simply dragging a folder to a document's window. However, this feature will include all files and folders in the hierarchy, which may sometimes not be wanted.
If you are only interested in showing the folders in a directory structure and no files, then you can still do this by taking advantage of how TextWrangler manages folder notation in its directory listing feature.
In OS X the folder separator symbol is a forward slash; however, this is a change from the classic Mac OS in which the folder separator was a colon. Nevertheless, OS X still recognizes the colon as a reserved symbol and will not by default allow it to be used in file names. However, in its directory listing feature, TextWrangler will use a colon to separate folders.
Since you are guaranteed for the most part that folder paths in TextWrangler will have a colon and file listings under these will not, you can use this difference to extract lines from a folder listing to only get a listing of the directories in a tree, instead of all files. To do this, run the following steps:
- Launch TextWrangler and drag a desired folder to the blank document window.
- Select "Process Lines Containing" from the Text menu.
- Enter a single colon symbol in the "Find Lines Containing" field, and check the option to copy to a new document.
- Click the Process button.
With these steps run, TextWrangler will create a new document containing only the folder hierarchy tree for your desired Finder folder.