If your Mac constantly connects to some open Wi-Fi network, and you don’t want to, you can forget it from your computer. Here you can find how to do it.
Forget Wi-Fi Network
- Click the Wi–Fi icon on your menu bar, and choose Open Network Preferences from the drop-down menu. (Or click on Apple’s menu, go to System Preferences, search for the Network icon and click on it.)
- Choose Wi–Fi in the left panel, while in the network window.
- Now, click the Advanced button in the bottom right corner.
- Click on the Wi–Fi (AirPort) tab and Highlight the network you want to disable in the Preferred Networks section.
- Click the minus sign below the Preferred Networks section to remove the Wi-Fi network.
- Confirm your action when asked, by clicking on Remove.
This will forget the selected network from your Mac, and you can repeat if you want to forget other Wi-Fi networks. Once you finish the process, macOS or OS X will not automatically join to removed networks. However, you cannot hide it completely so that it will never show up again as a choice. All the removed networks will be available if you want to manually connect to them later.
To prevent your Mac from notifying when new Wi-Fi networks are available you can do the following method.
Disable Ask to join new networks
- While in the Network Preferences, select Wi–Fi in the left panel (if it’s not already).
- Now uncheck the box “Ask to join new networks.”
- Click Apply.