[UPDATE] Having delved into the dark history of this forum, I found this post from 2006. That said there were problems with the Rev A update, and Aspyr were working with GameRanger to resolve them. I can't see any later information. I think Brad Oliver, who was the lead Civ3/4 programmer at the time, left Aspyr shortly after that. Maybe they never finished the job. You should also note that, as stated above, the old versions of C3C and PtW were both PowerPC-only applications. The principal reason for the Rev A update was to make them Universal so that they would run native on Intel processors. The bottom line is that is that if you want to run the old PowerPC versions, and you are running Snow Leopard then you need to install Rosetta from the Optional Installs on your OS X DVDs. If you are running Lion then you can't install Rosetta, so you can't run the older versions of Civ3.