Looking for an IF interpeter.

[John Moore]

Can someone tell me where I can find an interpreter for text adventure  
games? I'm a huge fan of them, and I want to get them on my Mac. Right  
now, I play them on my BrailleNote, which is awesome. But I'd like to  
see how they do on Macs. Can someone please tell me where I can find  
an accessible IF interpreter? Also, is there a package, similar to the  
Windows one, that allows a person to download all the z-machine games  
on the IF Archive. That was one of the things I liked about WinFrotz  
TTS. There was an installer that came with it that allowed you to  
install the entire IF Archive's collection of z-machine games. Thanks  
for the help.