Method #1


1) Turn off Wi-Fi


2) Open Network Preferences:


image.png



3) Click "Advanced"


4) Delete the ISTWL-"Name" using the +/- button:


image.png


5) Click "OK", then"Apply"


6) Turn on Wi-Fi




Method #2


1) Turn off Wi-Fi


2) Open Network Preferences:


image.png


3) Click "Advanced"


4) Delete the ALL Wi-Fi networks using the +/- button:


image.png


5) Click "OK", then "Apply"


6) +/- create Wi-Fi


7) Click "Apply"


8) Turn on Wi-Fi