Re: How Do I Upgrade to v10.5.8 or Higher?

How did you do the uninstall? Via the Media 100 installer/uninstaller? Or by just deleting the Media 100 folder?

You can look if your Media 100 files are deleted correctly. Go into YourHardDrive->Library->QuickTime and look for files named Media 100 there.
Then go to YourHardDrive->System->Library->Extensions, and to YourHardDrive->System->Library->Frameworks. There should be no Media 100 files left there. If there are, delete them and restart your Computer.
Anyway, not really sure if this will change anything, since Media 100 and FCP should work correctly on the same system. But maybe there is something that conflicts with 10.4.11