How to forget a Wi-Fi network on your Mac

[iMore.com]

By default, your Mac will remember settings for any Wi-Fi networks it's connected to in the past. This can make things really convenient as you move around; if it's for networks that you no longer have access to or don't want to use, however, it can be really inconvenient ? because sometimes your Mac will try to connect to networks it can no longer work with. Here's how to fix it.

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