So my friend finally expressed some interest in trying these visual novel things I'm always gushing over. I passes her my external drive full of the things and she settled on trying Grisaia (may have influenced that a bit). It installed fine and all of the functions (menu, etc) were working just as well. Immediately after meeting Yumiko for the first time the screen will go black, sound stops, and the game freezes making her have to forcefully shut the game down. And this happens in the same spot, every single time.
We tried the usual fixes like system locale, updating video drivers, reinstalling, etc etc. Still happens. I tried installing it on my computer and everything works perfectly, so it's definitely something specific on her end. Now for some specific details that may matter- she's playing this on a mac and using Wine. Not sure if that actually limits down the problems or not, but I've seen the two mentioned a few times through google for the same problem.
Anyways, any help you fine folks can provide would be greatly appreciated. Thanks again in advance.