Sometime ago I spotted this KB article stating that SQL Server 2005 was not supported on Intel-based Apple Macintosh computers running Microsoft Windows operating system.
One of the things I learned with Ingres was that "not supported" is not the same as "it does not work".
So, last week I spend some evenings/nights pushing my luck and managed to get Vista and SQL Server 2005 running on an intel based iMac. During those installations I saw quite some freaky eror messages, warnings, aborted installations, and more funny stuff. Which again reminded me of ... ;-)
At the end of the week I had SQL Server 2005 running on Vista on an intel based iMac. It's not supported ... but it seems to work.