After Apple released mavericks as a free upgrade; out of a lot of excitement I have upgraded my mac to this new OS. I enjoyed it a lot but disappointed with one problem ie. I was able to connect to internet with a lan cable but not with a wifi network. Since the upgrade was new I couldnt figure out the exact problem nor able to google it. After few days of research, got the solution from one of the mac experts. Follow these steps to get your internet connection back via wifi.
1. Backup these 2 files:
/Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
/Library/Preferences/SystemConfiguration/preferences.plist
(ie. Copy these two files into some safe place)
2. Delete these 2 files and reboot the system.
3. Reconnect to internet with wifi.
If there are no hardware problems and if proper internet settings are persisted, above steps would solve your connectivity problems. A detailed screenshot of the files is as shown .
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