This is the Operating System used by Apple Macintosh desktop computers, not to be confused with that used by their smartphone and tablet devices which is iOS.
Man in the middle (MITM)
As the name suggests, this is a form of hacking where network traffic or messages are intercepted by someone sitting between the sender and intended recipient.
Typically, the attacker will either take a copy of the traffic so they can see what was being sent, or they will actually change the content of the traffic.
For example, they may change an email which says “I do not want to buy this product” to “I want to buy this product”. It’s therefore quite a dangerous means of attack, particularly as the recipient may not know the messages have been intercepted.
This is the catch-all term for all types of software which is “bad”, including viruses, worms, trojans and ransomware. Antivirus software is now often labelled Antimalware because it does much more than simply protect against viruses.