How to run a game made on a Mac on a PC?

I made a game using unity on a mac then burned the game on to a CD the took it home. I then I put the CD into the computer then it asked me what program it I wanted to run it with. I don’t know what program to use. It might be that my computer is to old to run the game but I am not sure. Which program should I use or what I should do to fix the problem. Please help.

                                 -Thank You

Im guessing you do a Mac build, which creates a mac app file.

A Mac build will not run on a PC.

You need to do a PC build, which creates an exe file and a folder of assets