Brian has an excellent post about installing OpenSolaris on the MAC. As he notes he is "not the first to document this configuration (1).
However, I wasn't successful with any of the other approaches I
discovered. Maybe this was because it most cases they were using a
pre-release build of OpenSolaris 2008.05. So, for what it's worth, here
are the steps that led me to success... "
Check it out here: