1 - iODBC
Install latest stable version from here: http://www.iodbc.org/dataspace/doc/iodbc/wiki/iodbcWiki/Downloads


2 - Data Virtuality ODBC Driver

2.1 - Download DataVirtualityODBCforMacOS.zip from Data Virtuality Server Download section. 

2.2 - Unzip the Archive. Copy the 'DataVirtualityODBC' folder to /Library/ODBC/ODBCDataSources

2.3 - Install driver in /Library/ODBC/odbcinst.ini by adding

---
[ODBC Drivers]
Data Virtuality ODBC Driver = Installed

[Data Virtuality ODBC Driver]
Driver = /Library/ODBC/ODBCDataSources/DataVirtualityODBC/dvodbcw.so
---

2.4 - Create a DSN by editing /Library/ODBC/odbc.ini. Add following snippet. Adapt values as needed. 

---
[ODBC Data Sources]
dvodbc = Data Virtuality ODBC Driver

[dvodbc]
Driver     = /Library/ODBC/ODBCDataSources/DataVirtualityODBC/dvodbcw.so
database   = datavirtuality
servername = <ip or hostname>
port       = 35432
username   = <your username>
password   = <your password>
---

For ssl the default port is 35433 and the paramater sslMode needs to be added and set to something dfferent from 'disabled' (allow, prefer, required, ...).