How to hide my Warcraft 3 folder so my parents won't know I installed it on the computer?

Im gonna install it on a mac. But is there any way of hiding it so my parents can't tell its on the computer? They do look at the history of finder "sometimes" but I'm also trying to convince them that WC3 doesnt harm the computer, doesnt take up all the space etc. My stepmom has like hundreds of GBs on her computer and shes afraid that installing my game will take up all of it