- Click the Wi-Fi icon from the tray along the top of the screen then click Open Network Preferences...
- From the menu on the left, click Wi-Fi
- Click Advanced...
- Click the Wi-Fi network you want to remove (or ⌘+click to select multiple networks) and click the minus sign to remove the network
- Click Remove in the window that pops up
If you need further assistance, let us know. Click the new ticket button in the bottom left and we'll help you out!