Here's how you can get File Watcher Utilities for free for OS X. File Watcher Simple lets you monitor folders for file changes on your Mac.
1. Go to the File Watcher Utilities download page.
2. Click the Download button.
Here's a description of File Watcher Utilities:
"File system/directory monitoring utilities with loggin and task processing support (can execute files or make a WCF service call). Multiple configuration options. Source code libraries can be used to create a custom file system monitor."
For more, see the original article at the link below.