What a great surprise!
I've been playing this game since version 2000 with my PowerMac 8500. Then I started to play the 3000 in my G3 iMac version and just stopped when I installed MacOS X and it became incompatible.
Finally I bought a Core 2 Duo iMac that is capable to run the SimCity 4 witch is compatible with OS X, but it runs like a crap with Intel Macs.
I'm just waiting for this new version!