The scenario is not compatible with the Macintosh version of Civ 3. I just tried installing it on a G5 machine, and got a persistent error message. That is, even after moving a copy of the Otomo Spearman folder from the Play the World Game Data folder to the AC folder I got the same error message as before. This means there's a mistake in the BIQ itself, and scenario author Keroro appears to be reluctant to fix that error. I realize there is a 'fix', but that requires messing with the core files. I refuse to mess with the core files for any app on my machine. I will not add an extra folder when that folder is not strictly necessary. It's not necessary in this case because Keroro could easily edit the BIQ to correct any error. One day, it is to be hoped, there will be a Civ3 editor for the Mac (a private initiative) from another party. When that happens I'm going to edit the AC BIQ and make it available to Mac users. Until that day, don't bother with Alexander's Conquests unless you have access to a Windows machine.