I am pretty new to using a mac. Got a macbook running Leopard. I know for a fact my computer was being spyed on. It was at least when i was on the same network with the person, not sure if they are able to do it off of the network too? Where should I look on the laptop for signs of this? How can I stop it from happening next time I'm on the network again with this person? What should I be looking for? Anything? Please help!!!!!!!