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Mavericks upgrade wifi problem exclamation mark

Upgraded to Mavericks last night. Since then, no internet connection. iMac connects to the right AP but shows an exclamation point.

Wifi was working before the install and the other Macs with previous versions of OS X are connecting fine with the same AP.

Anyone had a similar problem? Any ideas what could be wrong?

Thanks!

iMac (27-inch Mid 2011)

Posted on Oct 23, 2013 8:44 AM

151 replies

Aug 27, 2015 9:24 AM in response to Diddy777

Hi everyone,

I also came across this issue where my NIC had a self assigned IP and no matter what i did it did not get fixed. I fixed this by running below 2 commands from terminal, this fixed the issue for me.

sudo ifconfig en0 down

sudo ifconfig en0 up

replace enX with the NIC you have.

Mavericks upgrade wifi problem exclamation mark

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