Roxy, I think that you'll need to boot into OS/9 to run it. You may want to upgrade to v.4. It runs in OS/X and has some great new features. David On Jun 2, 2004, at 9:02 AM, Roxylee wrote: > Hi, smart ones, > > I had purchased TechTool 3 and reinstalled it after upgrading to OSX. > Now when I try to run it, Classic opens, then I get a message saying > that it is not a Classic application. I ran Classic, installed it in > my sys 9 folder, and got a message saying it wasn't supported by > Classic. ?????? Any advice? > > Roxy >