Everything used to be ok until recently that a mac mini on a child profile stopped connecting to the internet when added to the profile. If i remove it, it works fine. there is no settings on the...

@woozle thanks for checking that. The reason I want it is to proactively prevent my child to connect to third wifi at home. With your funding, I must connect my child's machine to this wifi once, and...

Using Tether app, I click on more > Block list and add a new entry for a MAC address of a device at home to block, it seems added but if I go out of the manu and come back in, the new entry is gone....