Thanks for your quick response yet it leaves me a bit confused, since I realize I'm less technically apt than I sometimes think I am. When I googled "How to change my WiFi Network password" the first thing that came up was the Apple post (dated 2012 as in 'old') instructing me to to my Network in Preferences/advanced/ then delete (-) the network I ant to change, hit + sign , find Network and give it new PW--all within the Network System Preferences. And I gather from your reply that is wrong--perhaps it was the old way-- and that the change is done entirely on my router, a Netgear AC1750 model. And then I must ask, since I have to different Netgear logins in my PW List, one I call Netgear: routerlogin.net with Admin as the username, and another as my Netgear acct. I presume it would be the former.