I have unstuck the old thread on this subject, as the new version of Civ5 in the Steam store now operates the same as the Windows version.
You can simply download mods from the Steam Workshop and run them. You no longer have to edit the scripts or run AppleScripts to make them work.
If you really want to run mods in the Mac AppStore version (Civ5 Campaign Edition), then here is the old thread. I don't plan to maintain it in future, as mods in the Mac AppStore version always seem to be a bit tricky.
You can simply download mods from the Steam Workshop and run them. You no longer have to edit the scripts or run AppleScripts to make them work.
If you really want to run mods in the Mac AppStore version (Civ5 Campaign Edition), then here is the old thread. I don't plan to maintain it in future, as mods in the Mac AppStore version always seem to be a bit tricky.