I could not get Fireworks CS4 to successfully run on my Mac
running 10.5.5. After several install/uninstall/reboot/repair
permissions cycles, trying to install it under a different user,
installing it after a Safe Boot and pretty much everything short of
having a witch doctor attend to the computer, I finally got it to
install and run without failing with the "AMT Subsystem Failure"
If you have installed the Fireworks CS4 beta it is important
that you use the uninstaller to remove it before attempting an
Being an old Mac hand I did what a lot of us do: I dragged
the beta to the trash and emptied it. I deleted the old prefs file
and thought I was done. However, after spending hours trying to get
the new CS4 installed I finally downloaded Adobe's CleanScript and
ran it. It found the beta uninstaller (!) and asked me if I'd like
to run it. I did. After rebooting (to be safe) I tried again to
install the new CS4.
It worked just fine.
So if you have installed the beta make sure you use the
uninstaller to remove it before attempting to install the new CS4.