Hey,
I've looked around for a bit, but can't seem to find a way to disable internet connection on my Mac. BEFORE YOU SAY ANYTHING -- It is not a simple as turning wifi on and off, as I need this to be undetectable. My sibling doesn't get internet access at home, and now that we're at a resort hotel with free wifi, she is in heaven (to my parents' disapproval haha).
I don't want a third party program if possible, so I want to know if I can disable, say, the MAC address or block everything in firewall (which would be easy to detect).
Thanks!
-Kermit