If you can find a copy of a system folder for 9.1, you can drag it onto your Ti, log out, log in and use the OS 9.1 system. It might work if the drivers are included. The problem is that the drivers and the system need to be installed before you install a version of OS X to make it work. On Jul 9, 2008, at 9:06 PM, Don Williams wrote: > Mine turns out to be an 800 MHz model, but I have no idea when it > was manufactured as my son bought it second-hand. As it won't boot > from an OS 9 disk I guess it must be one of those that you mention > (after Jan 10, 2003). > > In a rather Catch 22 situation, I have a retail OS 9.0.4 and the > Tiger accepts its copied system folder for Classic but then says I > need at least 9.1. But if I have no way of running OS 9 I can't > update it. So it looks like there is no solution, but luckily the > application I would like to run (Music Mouse) is not in any way vital.