How to connect to a Wi-Fi network that requires a special sign-in In my residence there's a new Wi-Fi system.
We connect to this network that requires a password and then it is supposed to redirect us to a website that ask for another, personal password.

So far I have been able to connect my Samsung tablet and phone, after I connect there appears a message to sign-in to the Wi-Fi . 
But using my MacBook it's not the same: I type the first password and connect but there's not an option to sign-in. 

I don't know what to do now.
I have had this problem many times with my Mac at places like hotels and universities that use a web based login.

smoosher is on the right track. After the WiFi login, you need to go to a web site that does not use HTTPS. The New York Times is an example (http://nytimes.com). This will cause the redirect you need to the second login page. Sites that use or offer HTTPs probably won't work for the redirect.