Ben has an excellent point:
if things are broken on mac, lets fix it! Especially since we should be hitting RC status shortly.... any breakages should be smashed ASAP.
This does raise a point I hope we'll address more aggressively after the 7.8 release, namely trying to keep ghc less broken by default! GHC being really really really broken between releases is probably the single HUGEST barrier to more people getting involved in helping GHC dev. And I think thats a huge problem we need to take more seriously.