The Documentation for setup of ODBC on the Mac looks to be outdated.

It states that we recommend openODBC for the mac, which is probably no longer the case. OS X now comes with iODBC, which simplifies the process of using ODBC with 3rd Party Drivers for developers, as long as they ensure they use the SQL_OV_ODBC3 parameter in their applications.

It could also be a bit clearer about the need for a third party driver to connect to SQL Server, and possibly suggest something like FreeTDS or one of the commercial solutions.