Wifi Greyed out with exclamation mark, but wifi still works !! after Mavericks upgrade.

You're very welcome. I don't know of a way to test everything. Just wait and see. If a problem should arise, putting the old pref files back to their original location and rebooting would indeed allow you to revert to the old settings.

I just opened network preferences under the wifi icon menu and it said I had no global IP address (it wasn't receiving one via DHCP and was generating its own local IP). The simplest way to solve that is to turn the wifi off and on and it will automatically ask for and obtain another IP. You could also command line release the IP and then ask for another one, but an off-on does the same thing. When people rebooted the entire computer they were trying to release the APIPA IP and get an active one for external networks, but they may still wind up keeping the old one and therefore experience problems. A reboot should theoretically have solved the problem but they may have retained a connection to that old number as your computer likes to hold onto information.

i have the same problem. What is meant by "backup" those 2 files? Bookmark them? I simply put them in the browser window like a webm address, is that right? And what is meant by "deleting" them again. Sorry, don't be it

hello I was wondering how to locate these files?

Great! Thanks

thanks alot for this detailed process, i have been trying to find the solution for this problem since long but atlast it solved

thanks.

cheers

Thank you wifiguru! It worked!!! 🙂

Thank you wifiguru! Worked like a charm!

I had a question. This worked for me so that you SO MUCH. However, what do i do with the 2 files i backed up? its on my desktop. can i delete them? Or back them up someplace else?

How do you access the /library folder when it's says "access denied"