10.8.4 upgrade unable to connect to wifi

After upgrading to 10.8.4, wireless card will not turn on and find the wireless services.
I cannot even turn it on through network preferences.

I had the identical issue after upgrade to 10.8.4
The down side of deleting com.apple.network.identification.plist is that you lose all your Network preferences. As a frequent traveller, this was not attractive to me. I tried copying com.apple.network.identification.plist from the .old directory as root to try to restore them, but that didn't work.
An alternate, less destructive fix that worked for me: add a location, change to that location. Bam. Done.
>SystemPreferences >Network > Location > Edit Locations +to add a new location, Apply, then Reboot.
I kept all my preferred networks intact AND solved the issue of Wifi not connectiong automatically.
Not sure what the root issue is, and that bothers the geek in me, but having lost my Saturday Morning trying different solutions, I'm going to let that sleeping dog lie and be glad it's working. ;-)

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