I noticed that there are four networks listed on my Mac that are password protected and I have no idea what or who they are. How can I delete them? I googled them I only found out something about one of them. One of them is a Charter network. Not sure why it is showing up because I do not use them for the Internet.
macOS Sierra (10.12.1), Intel Quad Core i7 8GB 1 TB HD
when you click on wi - fi icon on top right side may bar , you will see neighbors wi fi network name that is having lock in front of them as they are encrypted so leave them .
A second thought when you open system preferences > open the pad lock by entering admin password if they are shown in white column shown with red arrow select them and click on minus sign .
And why it is showing because your settings are incorrect , & we can configure once again the network settings in a very secured way .
Your Mac will list all available (within range and compatible with your wifi card) that are broadcasting their SSID. The only way you can not show them is to turn off your wifi card.
to avoid having you Mac evaluate those networks or consider trying to use them, use this two-step process.
check the box and it will no longer consider new networks.
then use this step:
select any networks on the list you do not wish to consider joining, and click the [-] icon to remove them from consideration. You may already have no stray networks, and that is fine.
Unwanted WiFi Networks
