I just hit reset network settings on my iPhone (9.2.1) because I was unable to make phone calls.
I then noticed that my OSX (10.11.3) lost its internet connection. I immediately checked the keychain (where all wifi passwords are stored) and noticed that all passwords are missing.
I can only assume that resetting the iPhone "network settings" also affected my mac. I assume this occurred through iCloud.
Question
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How can I get those Wifi Passwords back?
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How can I prevent this from happening again?
Best Answer
Check to seen if your passwords still exist under
Safari > Preferences > Passwords
on your Mac. Maybe they are still there.If this doesn't work, try the following: Unplug your router's ethernet cable (so that iCloud cannot sync with the server) and try to restore your from Time Machine. This should revert your Key Chain. I recommend disconnecting your router because if you just turn off your wifi, it will probably turn back on after the restore is done and sync with iCloud again.