Mac network setting?

I have Mac and I used to connect to my home network via wireless, everything works fine.





But recently my kid used it in his friend home and his freind reconfigured it so that it can connect to his home network wirelessly, after that, I cannot reconfigure it to connect my own home network any more, I tried everything, it still does not work, anyone know where I should check? and anyway I can clean up all of network setting and start over?





Thanks for help

Mac network setting?
You can readjust your network configuration back to your old setting by following the step-by-step procedure from below:





https://www.washington.edu/computing/wir...





Good luck.

dentures