Diablo II on Mac

Hi, I recently decisided that I wanted to try and play Diablo II on my macbook pro, and so I checked to make sure the game was MAC compatible and it said it was on the box. So, I went and tried to install it, ut the disc in, clicked on the install icon and it opened a window, and I clicked on install and it said the game was not MAC compatible. I don't understand why that is,but I was wondering if someone might be able to tell my why, or even how to get it to install. Thanks in advance.

Mac Book Pro Mac OS X (10.4.9)