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I want to reinstall my Macbook, but i do not want to loose all my saved WPA/WEP Wi-Fi profiles.

Is there a way to back them up and restore them after the reinstall?

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If you backup your keychain as well as the file /Library/Preferences/SystemConfiguration/ and restore them on a new installed Lion, you won't lose them.

Another way would be to use the Migration Assistant on a Time Machine Backup of your old system, but this would restore ALL your system settings. That's probably not what you want, otherwise you wouldn't consider reinstalling.

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Looking in in a text editor doesn't show any of my wifi SSIDs, but I do see them in /Library/Preferences/SystemConfiguration/ – user24902 Jul 6 '12 at 2:30
OK, so backup this. – Max Ried Jul 6 '12 at 10:57
Okay, so edit your answer. – Bryson Dec 30 '13 at 22:37

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