Wi-Fi Error: Cannot Join Wi-Fi Automatically

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Wi-Fi Error: Cannot Join Wi-Fi Automatically

If you understand Chinese, please go to http://mac.pcbeta.com/thread-131074-1-1.html.

Recently there was something wrong with my MacBook Pro 13-inch Mid 2012 running OS X Mountain Lion (10.8.2). It cannot join Wi-Fi network automatically.

Everytime I have to enter password, and then it can connect to the Wi-Fi, but it still tells me "cannot connect to the Wi-Fi".

How to fix this?

(It cannot join the Wi-Fi automatically. )

(I have to enter the password. )

(Connection was established but it gives me a wrong feedback. )

(I've already set the Wi-Fi as the first-pick one. )

I tried changing positions, checking file systems, changing MTU, updating DHCP but the problem is still there and I don't know what to do.

So could you help me? Thanks very much!

MacBook Pro, OS X Mountain Lion (10.8.2)

Posted on Feb 13, 2013 1:36 AM

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Answer 1

softwater

Level 5

5,556 points

Feb 13, 2013 2:43 AM in response to Satelli

In your last screenshot, click on the "DNS" tab and remove any DNS addresses in the left hand panel. Click 'OK' and then 'Apply' and try again.

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Answer 2

Satelli Author

Level 1

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Feb 13, 2013 4:38 AM in response to softwater

Thank you.

But I didn't config any DNS settings. Just as the default.

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Answer 3

softwater

Level 5

5,556 points

Feb 13, 2013 5:11 AM in response to Satelli

Satelli wrote:

(Connection was established but it gives me a wrong feedback. )

I'm not sure what this means, but it could be that you're using the wrong password encryption. Is this a public wifi signal you're trying to connect to?

If so, try deleting the saved password from Keychain.app (search in Keychain for the Wifi name), then try connecting to the wifi again. When it asks for the password, try changing the encryption code from WPA/WPA2 to WEP and see if it will accept the password.

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Answer 4

Satelli Author

Level 1

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Feb 14, 2013 4:40 AM in response to softwater

Thanks a lot.

I mean when I enter the RIGHT password to my own Wi-Fi and the network can be set correctly and I can browse web pages but the notification was that the connection failed.

I deleted the password from Keychain.app but the problem is still there and I don't know what to do next.

Do I need to restore the system?

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