I went to a coffee shop that had Wi-Fi this morning and they gave me the network name and password. In the top-right corner of my desktop there is the Wi-Fi menu, and I selected it to "Turn Wi-Fi On" It searched for a few seconds and correctly found their network.

I then tried to connect to it, but botched/fat-fingered the password and pressed Enter ⏎ by mistake. I then wasted about 20 mins trying to find a way to change the (bad) password that my Mac was using to authenticate with. I gave up and came home.

So I ask: How do you change the password for a Wi-Fi network?


There are two ways to do this...

Modify the Password in Keychain

You can do this under Keychain Access. You will find all your saved Wi-Fi networks under the "System" keychain in the "Passwords" category.

Double clicking on the SSID (mine are redacted for security) will bring up a dialog box with the details for that particular Wi-Fi network. From here, you can enter in a new password.

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Delete the Network & Rejoin

You can also solve the issue by deleteing the network and rejoining it. Simply go into your System Preferences > Network and select your Wi-Fi Adapter. Click on the Advanced... button and you will be able to delete your Wi-Fi Network. Just rejoin and enter in the good password.

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  • 1
    You have to Apply the change on the main Network window, after OKing out of the Wi-Fi window. That might be the reason it's failing. – user11633 Aug 4 '16 at 23:36

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