This issue[0] was what was keeping xmonad from building for me, though I don't have a mac to try on again. 0: https://github.com/haskell-pkg-janitors/X11/issue

This issue[0] was what was keeping xmonad from building for me, though I don't have a mac to try on again. 0: https://github.com/haskell-pkg-janitors/X11/issues/24 https://github.com/haskell-pkg-janitors/X11/issues/24