If you installed the Girl in the default location and haven't moved her since, she will be in a folder called "DAZ the Girl".  I'm on Windows, so I don't know what the folder / file names would be on a Mac.   I am pretty sure the Girl is exactly where I originally put her.   I have, at the top, " !The Girl BLANK ".   Next down is " !The Girl  ".   Third is the one Karen mentioned:  " The Girl V3UV ".   You should have all of these in your basic set (from DAZ) already.