I am such a noob with this stuff nowadays. I feel like I would have figured this out in my teens/20's, but I am struggling in my mid 30's!
After messing around with the .toast file I couldn't get that to work. I then downloaded PlayOnMac and that installs fine, but I cannot get AvP2 to play on it with the current system on my Mac. It keeps saying not supported with the files I've downloaded from AvPUnknown. If I ever switch back to PC in my life, I'll probably be able to get it working then.