Installing osm2pgsql on Mac: Error ‘dyld: Library not loaded: libc++.1.dylib’

I try to install osm2pgsql on Mac OS X Snow Leopard (10.6.8) using the binaries I found on Osm2pgsql - OpenStreetMap Wiki -> Providing OSX binaries/packages #15 - GitHub -> osm2pgsql-0.84.0.

When trying to run it, I have this error message:

dyld: Library not loaded: /usr/lib/libc++.1.dylib
  Referenced from: /usr/local/bin/osm2pgsql
  Reason: image not found
Trace/BPT trap

I was successful on installing from binaries on more recent version of MacOSX, but here it does not work.

Any suggestion? Thanks a lot in advance.