Yup, same. Seems it's crashing in the gameoverlayrenderer.dylib every time. That's the Steam in-Game overlay, which is loaded even though it's disabled. You can work around this by running Civ 5 directly from Terminal.app by entering:
Code:
cd ~/Library/Application\ Support/Steam/SteamApps/common/Sid\ Meier\'s\ Civilization\ V/Civilization\ V.app
env DYLD_INSERT_LIBRARIES="$HOME/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/steamloader.dylib" ./Contents/MacOS/Civilization\ V
This changes to the folder where steam can find steam_appid.txt and then runs Civ 5 (bypassing the launcher) with the necessary steam lib, but without the broken game overlay lib. Works for me