Reset Your Wireless Network - Mac

Forget a network on your Mac

1. Choose Apple menu  > System Preferences, then click Network.
2. Select Wi-Fi in the list on the left.
3. Click the Advanced button.
4. The Wi-Fi pane shows a Preferred Networks list. Select the Wi-Fi network that you want your Mac to forget.
   
5. Click the remove button (–) beneath the list. If you're asked to confirm, click Remove.
6. Click OK.
7. Click Apply.

Remove Key Chain

1. Open Keychain Access from the Utilities folder (Applications > Utilities) in Finder.
2. Find the specific entry that you want to remove from the system in this case, APS.
3. Control-click the entry and click on Delete [entry].
4. You may require verification to modify the Keychain. Enter the password for your account.
5. Click Delete when prompted.

You can now reconnect to the network.