Have to ask what automation program you are running? xTension is used here and it works great under Classic. The only concession was that the serial ports did not work. I finally went back to booting into OS9 as I didn't want to dedicate an OS 10 machine to the routing task of turning on and off the lights. > Why not accept Classic as the "emulator" for OS 9. That how it is > functioning as isn't it? :-) Not quite. I have a Home Automation program that doesn't work properly in Classic. It seems to need an INIT or two to load at startup. It won't load in Classic, apparently. It can only be done by booting into OS 9 from scratch.