Did you read it? This is from the macfixit page that you quoted. mark ****Though the operating system update has yet to be released by Apple***, Connectix says that Mac OS X 10.2.3 is required to achieve maximum performance (a 25 percent speed increase according to their figures) with the newly released Virtual PC 6.0 - a US 99.00 upgrade. On Thursday, December 19, 2002, at 08:52 am, Richard Kriss wrote: > I just noticed a blurb in the MacFixIt making reference to Mac OS > 10.2.3 > > When was 10.2.3 released? > > ------------------------------ > Title: Connectix recommends Mac OS X 10.2.3 for Virtual PC 6 > Date: Wednesday, December 18 2002 @ 12:55 PM PST > > Read the full article at > http://www.macfixit.com/article.php?story=20021218125454412