How to stop WiFi password sharing?

I believe the answer lies in creating a separate user account for your children with a separate Apple ID. That way, they won't share your account information.

macOS Sierra: Set up users, guests, and groups on your Mac

On your Mac, open System Preferences / Network. Select the WiFi entry in the left pane. In the right pane, click the Advanced button in the lower right corner. Under the WiFi tab and within the Preferred Networks, delete your work Network Name from the list. You should only be able to manually connect to it. But once you do, it will get added again to this list unless you uncheck the Remember networks this computer has joined.

UPDATE: You will need to also TURN OFF iCloud Keychain in System Preferences / iCloud on your Mac or iDevice.

Avengingknight wrote:

They have their own accounts, I just don’t want to automatically login to my job’s WiFi from my Mac. I need to keep that separate and in my iPhone only. My kids do use my computer for their homework if that helps.

Do they have their own accounts on your computer? Or are you all using the same one? I don't mean Apple ID. I mean log in to the computer. If they have their own account on your computer, they can then use their Apple ID in their account.

keg55 wrote:

The key is to turn off that iCloud Keychain on your Mac. Then any connections from your phone won't carry over to your Mac.

But, then, of course, the OP will lose the ability to share passwords across devices themselves.

Avengingknight wrote:

They have their own computer but use mine every now and then.

Set them up a user account on your computer for when they need to use it. That way, you get to keep the benefits of Keychain on all your devices and they don't print a report on the French Revolution at your work printer.

Best of luck.

In the iCloud System Preferences, stop using Keychain.

The key is to turn off that iCloud Keychain on your Mac. Then any connections from your phone won't carry over to your Mac.