Interesting 🤔. Here is the answer....

'Mac" in "mac and cheese" is simply a shortened version of the word "macaroni," meaning the dish is made with macaroni pasta and cheese, so people just use the abbreviated term "mac" for convenience.

Key points:

"Mac" is not an acronym, it's just a shortened way of saying "macaroni."

This is a common way to refer to the dish in everyday language. '