Facing this issue for a long time now in my Macbook Pro and have tried so many things, still no use. Whenever I try to connect to the Wi-Fi for internet connection, it connects to the network but the time when I try browse for internet it just shows the Alert message as “No Internet connection” but to the same Wi-Fi I am able to connect various other device. What is the issue? My Macbook Pro runs with Mountain Lion OS.