How to forget a Wi-Fi network on your Mac, so your computer stops automatically connecting to it

You can easily forget a Wi-Fi network on a Mac through Network Preferences when you no longer want to automatically connect ...
Ars Technica

cant access other computers on network

I have a dlink cable modem which connects to a 4 port dlink wireless router, and on the wireless router I have a gigafast 5 port switch. In total, I have 4 desktop computers hooked up, and two laptops ...