[Topic moved here.]
Unfortunately the forum software's search functionality ignores terms of 3 characters or less, so it will only find search terms with 4 or more characters. (There is a setting within its administrator control panel to adjust the minimum search term length, but that still doesn't allow 3-character search terms.)
dhm wrote:And what is the answer to the customer's question?
Yes -- macOS 11 ('Big Sur') is supported. It's listed as such in the document via the 'Prerequisites' link near the top-right of this page: https://www.hauptwerk.com/requirements/
There are some minor compatibility issues which are listed in the 'known issues' appendix in the Hauptwerk v6.0.2 release notice: https://www.hauptwerk.com/documentation/