Related to this discussion https://jamfnation.jamfsoftware.com/discussion.html?id=19092 but a little more specific to our needs:
We have our company WiFi that is joined by 802.1x and AD certificates via Configuration Policy pushed by JSS. Many laptop users will connect to dozens of other networks throughout their journeys. This list of "Preferred Networks" the computers remember can get quite long. One user had over 100 SSIDs! Having a lot of preferred networks can cause network connectivity weirdness. Purging all the non-company SSIDs will usually stabilize the connection. The problem was that I couldn't find a way to programmatically delete everything EXCEPT the company WiFi from the list... until now. Using the networksetup command to delete ALL SSIDs isn't a good idea because it disconnects the user and because we're using 802.1x tied to AD certs, it gets quite difficult for users to reconnect.
#!/bin/bash
# SSIDS is the full list of every SSID the computer has in Preferred Networks
# CURRENTSSID is for whatever network the computer happens to be on at the
# time of running the script because we don't want to delete their current connection.
SSIDS=$(networksetup -listpreferredwirelessnetworks "en0" | sed '1d')
CURRENTSSID=$(networksetup -getairportnetwork "en0" | sed 's/^Current Wi-Fi Network: //')
# if you have other specific SSIDs you never want to delete, you could add them as additional elif $SSID == "whatever" lines below
while read -r SSID; do
if [ "$SSID" == "Your Company Inc secure WiFi" ]; then
echo Skipping $SSID
elif [ "$SSID" == "$CURRENTSSID" ]; then
echo Skipping your current network $SSID
else
echo Deleting $SSID
networksetup -removepreferredwirelessnetwork "en0" "$SSID"
fi
done <<< "$SSIDS"
echo Done!
I uploaded the script to JSS and created a Self Service policy for users to run as needed. it seems to do a good job and has been tested under OSX 10.10.5 and 10.11.5. Fortunately all our Macs have the WiFi on "en0". If your Macs' WiFi is something other than en0, you may have to adjust the script accordingly.
