I downloaded and expanded the only link I can see that works for ROM 1.03. I'm not convinced this will work fully on a Mac, as it contains a CvGameCoreDLL.dll file. However, I was able to get it to start a game.
Yes, there were tons of XML errors. My standard trick for dealing with these is already documented elsewhere around here, but here it is again!
1. The problem is invalid characters in XML text files. They work in Windows, but fail on the Mac. And I can't recall a mod created for Windows that hasn't had this sort of problem.
2. The solution I use is BBEdit's "Zap Gremlins" facility, and for a mod like RoM with over 200 files, about 190 of which needed fixes, the BBEdit Text Factory is highly recommended in order to maintain your sanity.
3. I set the Text Factory up to apply "Zap Gremlins" to all XML files in the mod directory and save the changed files. I then hit the Go button and a few tens of seconds later the job was done. I was then able to launch RoM and start a game.
You can download a fully working trial copy of BBEdit, and that should last long enough to enable you to fix RoM.
BBEdit has a free baby brother called Text Wrangler, but it doesn't have the Text Factory option. There may be other text editors with these capabilities, but as I have been using BBEdit for more years than I care to count, I haven't looked anywhere else.
