My daughter too is entirely trustworthy, but her middle school aged son although smart and well meaning is not particularly wise. So God only knows what gets into my daughter's Mac from her son's school.
Ponder this scenario:
- Your daughter receives a file from one of her friends which contains malware that infects your daughter's computer but she is unaware of the infection because the malware is new and its signature is as yet unknown.
- Your daughter creates a new Office file entirely on her computer, but the malware infection sneakily inserts itself into the Office file
- Your daughter sends the file to you and your anti-malware app does not recognize it for the same reasons you daughter's computer don't.
- Because your Office version is not up to date the malware is able to infect your computer.
- six months later there is a knock on your door and you open it to be presented with a warrant for your arrest for distributing porn and the evidence is found on your computer
It has happened in the PC world and could happen in the Mac world if you become too complacent. The bad guys depend on two things for their success, cupidity and complacency.
