Hi Thomas, I had a short look into your problem and can help you better if you give us some more insight into what you are trying to achieve. Are you going to use the ODBC driver for Microsoft Excel, or is it a more general question about ODBC drivers on MacOS? If you are trying to connect Microsoft Office with your Meisterplan reporting database, I would recommend you to have a look into the Microsoft documentation about ODBC. They suggest you use the PostgreSQL integration by actualtechnologies. This is not open source, like you asked for, but should be much easier to get working. I hope this helps you to connect you reporting database on MacOS.