Networkpasswordwifi
I want to remove the connected Wi-Fi password on my Mac so that it always ask me for my Wi-Fi password, but I am unable to do so. How can I do this?
I tried this by going towards System Preferences -> Network. I was unable to remove anything, however. See the following image of the settings.
The problem got partially better on its own, and it's not clear why. There were also a lot of old networks in the list of previous wifi networks in System Preferences, and it helped to delete them.
The complete fix, however, ended up being to go into the list of wireless networks (in System Preferences > Networks > Airport, Advanced) and move the desired network up to the top of the list so it was joined first. There was one called "linksys" on top that was matching a neighbor's network, and then failing to get internet access for some reason; I think it was added a long time ago for a different network of the same name.
I thought I had tried this before, but either something changed or I didn't actually try it. I'm asking this question to help me troubleshoot someone else's computer, so I'm not aware of everything that might have changed since I originally posted the question.
Make sure you are sharing internet from Ethernet to others computers using WiFi/Airport
Best Answer
EDIT 2 Sorry, misread the question.
Your System Preference pane is probably locked. The screenshot you posted is from the "Advanced" section.
Go back to basic network preferences, and look at the bottom left corner of the window. There should be a lock saying "Click the lock to make changes". Click the lock and enter an administrator username and password.
Go back to the "Advanced" settings and the controls will no longer be locked.
EDIT 2: Un-check "remember networks this computer has joined" to prevent your Mac from remembering the networks.
In Network preferences, remove the network whose password you want to enter each time.
In Keychain Access, search for the name of the network whose password you want your Mac to "forget". Then right click on it and click the item that says
Delete "item name"whereitem nameis the name of the password item.EDIT 1
If you want to prevent panes from locking, go to "Security and Privacy" preferences, unlock the pane (this one will always be locked) and click "Advanced..." in the bottom right. Un-tick "Require and administrator password to access system-wide preferences".