I just migrated from a 2008 MP to a 2012 MP and went through the migration process. Everything seems to be OK except I can no longer print. My Canon MP780, which has worked fine for YEARS, won't work because OS X says software is required. What?? When I look on Canon's website, they say "no software is required". I know that! It's worked fine for years! Why in the hell is this happening??