I had recently helped a customer configure automatic file extraction on a Mac computer, and thought I would share the details here.
This option works for all builds of Windows, MacOS and Linux, and can be used for data files from any Symphonie data logger - including SymphoniePRO
Install Mozilla Thunderbird (https://www.mozilla.org/en-US/thunderbird/)
Search for the Add-on “attachment extractor” [sharedmedia=core:attachments:32]
Install it
Restart Thunderbird
In the Add-ons manager, under Extensions click Preferences for the AttachmentExtractor [shared