The same bug (in the existing released binary) is reported here:
and in the comments a link to recent builds is given:
I don't know about stability, but 8.4pl4 appears to be working on Mavericks. I was able to build/install following README instructions (might additionally require install of OCaml and other tools, which I happened to already have.) The associated coqide also appears to be working without trouble.
I am not a seasoned Coq user, so if there are any functionality or stability considerations in this non-published version, then they would be going far over my head.