s.bernbaum
Mostly lurking
Well you can always roll back the Civ update if it doesn't work out. So I would give that a try and reinstall from the DVD if it doesn't work out.
Rolling back system updates are rather trickier - but why haven't you updated to 10.4.8 for independent reasons?
Thanks for the advice. I haven't updated OSX because I have a dial up account, which won't stay connected for the several hours needed to download the update. A friend with a high speed connection has downloaded it for me but I have been ill and haven't gotten over to his house to get a copy of it yet. I was planning on doing so, once I am well, but after reading the threads here, I wondered if it would ruin my Civ IV's operation.