ExifTool is both command-line tool and a Perl library to work with file metadata.
It is free and open-source software (FOSS), under a license GPLv1+ or Artistic License.
Installing ExifTool
You can install ExifTool on macOS by typing:
brew install exiftoolGetting Support
ExifTool Forum
ExifTool Subreddit
It is not popular, it is better to keep using the ExifTool Forum: