FSMonitor 1.2 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The size of the latest installer available is 5.2 MB. This Mac application was originally developed by Tristan Inc. The software belongs to System Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
Track all changes to the file system, including file creation, deletion, change of content, renames, and change of attributes.
Examine the changed files with any of the four provided display modes.
Inspector to display the exact kind of change.
Filter the list of changed files by path, event category, or process
Reveal changed files in Finder or Terminal
Clean and reload the displayed file system events.
You may want to check out more Mac applications, such as SmartSaver, PresButan or Peek-a-Boo, which might be related to FSMonitor.