is there play station 2 emulator for macintosh that works?

I downloaded an alleged PS2 emulator (blue ps2), so like an idiot I bought 
myst-iii PS2 at Fry's Electronics.  The employee told me I could return it

if it didn't work on my software.  It didn't work, and now they won't let 
me return it because I had to open the box to try it out in my cd drive. 
So I'm out $15 bucks unless I can get it to work.

The bluePS2 software says to insert the disk into the cd/dvd drive. 
Nothing happens when I do.

So....is there a decent PS2 emulator I can get for the mac?  Either os9 
or osx.

thanks.

d.

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