Batch exporting metadata from Finder
ExifTool might be able to do it.  You would need to extract them by name (see the MacOS tags page) or you could add the -api 'MDItemTags=1' option, as they are not extracted by default. 

A command such as this will extract your tags and create a CSV file for you
exiftool -csv -filename -MDItemWhereFroms -MDItemTitle -MDItemAuthors -MDItemDownloadedDate /path/to/files &gt;Outfile.csv