Bind SSL certificate to local port for Mono/OWIN
In OS X, the process responsible for accepting incoming connections is responsible for setting up and enforcing SSL/TLS. In most cases this will be a web server like Apache's httpd or nginx.

Take a look at SignalR and HTTPS for links and help to enable SSL support in signalR services.

Stunnel

If you can not enable SSL within your service, consider using stunnel:


  Stunnel is a proxy designed to add TLS encryption functionality to existing clients and servers without any changes in the programs' code. Its architecture is optimized for security, portability, and scalability (including load-balancing), making it suitable for large deployments.


Install with brew

stunnel is available through Homebrew. Once brew is installed, install stunnel using:

brew install stunnel