update text on mac download page
update text on mac download page

Ignore-this: c38c0a78ce301b920188d11890b4051
note: links are probably not correct

darcs-hash:20111207053931-5505d-296bc7102864c2246f493c74d862acecccee7cf8.gz

bgamari/haskell-platform,erantapaa/haskell-platform,bgamari/haskell-platform,erantapaa/haskell-platform,erantapaa/haskell-platform,gbaz/haskell-platform,ardumont/haskell-platform,ardumont/haskell-platform,thomie/haskell-platform,gbaz/haskell-platform