Adobe Acrobat Reader please go away.
I tried really hard to get PDF files on my Mac to open with the Apple "Preview" application instead of Acrobat. Sometimes it would just work, but there were clearly some mim types or something that refused to give up the Adobe connection. Finally I got fed up and delete all the Acrobat software from my disk.
Guess what? It worked. Now "Preview" opens all PDF files. I'm so happy. No more fat bloated viewer that takes 15 seconds to open and display an annoying splash screen. (Come on, splash screens are so 1994.)
Delete Acrobat Reader from your disk. You will be happy too.