First, install the following libraries:
$ brew install unixodbc
$ brew install freetds --with-unixodbc
FreeTDS should already work now, without configuration:
$ tsql -S [IP or hostname] -U [username] -P [password]
locale is "en_US.UTF-8"
locale charset is "UTF-8"
using default charset "UTF-8"
1> ^D
Onto unixODBC, we need to link to the driver, edit /usr/local/etc/odbcinst.ini:
[FreeTDS]
Description = TD Driver (MSSQL)
Driver = /usr/local/lib/libtdsodbc.so
Setup = /usr/local/lib/libtdsodbc.so
FileUsage = 1
The test command we're using requires configuring a DSN, so edit /usr/local/etc/odbc.ini:
[MYDSN]
Driver = FreeTDS
Server = [IP address]
Port = 1433
The configuration for your DNS might vary, you might need the TDS_Version or Servername directives. The above worked for me for SQL Server 2008 R2. Now, run the test command:
$ isql MYDSN [username] [password] -v
+---------------------------------------+
| Connected! |
| |
| sql-statement |
| help [tablename] |
| quit |
| |
+---------------------------------------+
SQL> ^D
If the test succeeded, you can continue onto installing the PHP PDO_ODBC extension for use with unixODBC:
http://php.net/manual/en/ref.pdo-odbc.php