[Haskell-beginners] Platform for Mac OS 10.6

[Henry Lockyer]

Hello people - trying to get back into Haskell again after previous flirtation which was long enough ago to forget almost everything, it seems.
I appear to be lost in a mirror maze in trying to work out again how to bring my platform more up to date on Mac OS 10.6.8 (Snow Leopard).

The macos link for download at
http://www.haskell.org/platform/mac.html
however does not seem to work. I do not get a working installer package just an "Unknown" 204mb file. 
?

Sniffing around via GHC pages I find this page:
http://www.haskell.org/ghc/distribution_packages
where it says
"For Mac OS X we provide a native system installer, available on the download page for each release. We recommend using these installers "
However the 'download page' link just takes you circularly back to 
http://www.haskell.org/ghc/download
?

This page
http://www.haskell.org/platform/index.html
says the the current platform version is 2013.2.0 

From my own past notes I should currently have platform 2011.4.0.0 
I do definitely have GHC  7.0.4-x86_64

I also ran 'cabal update' as I dimly remembered that I should do this, and it indicated there was another version of cabal install available by doing a "cabal install cabal-install" but this complains:
"$ cabal install cabal-install
Resolving dependencies...
cabal: cannot configure process-1.2.0.0. It requires base >=4.4 && <4.8
For the dependency on base >=4.4 && <4.8 there are these packages:
. . ."
I have base 4.3.1.0    (as indicated by GHC-PKG LIST).


I thought refreshing the overall package level would be the most straightforward way to update to a consistent state as at least the first step.

Hopefully I'm just having a bad day...

I have two main motivations here (1) general refresh (2) get latest Open-GL stuff    - in case that affects the answer.

Can anyone recommend/remind/help with how best to approach this? 

Many thanks/ Henry


 
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