I would like to know more about the comparison too. I am a Mac convert and have BIAB 2008 running in Fusion. I would like to have 2009.5 in Mac, but from all the data in the BIAB web site, I can't seem to figure out what to do?

Can I use the "update" price to go to Mac 2009.5, based on my past purchases of Win? The latest purchases were UltraPak 2007, then a MegaPak upgrade to 2008.

Confused.