Working with Subversion on OS X behind a Proxy

To connect to external SVN servers behind an HTTP proxy, you have to configure subversion to connect over the proxy. This can be done using the servers file in the .subversion folder in your home folder (~/.subversion/servers).

In that file you will find a proxy section like this.

[global]
# http-proxy-exceptions = *.exception.com, www.internal-site.org
# http-proxy-host = defaultproxy.whatever.com
# http-proxy-port = 7000
# http-proxy-username = defaultusername
# http-proxy-password = defaultpassword

Uncomment the lines that match with your proxy configuration and replace the dummy values with your actual values.

I've tested this in Versions (Subversion client with a graphical UI) and command line client on Snow Leopard.

Note: If you're using Versions, restart Version first!