1 Reply Latest reply on Aug 12, 2010 9:57 AM by Linus Su

    Acrobat CS3 "You have entered an invalid serial number. Please correct it in order to proceed." Huh?

    Linus Su

      I purchase CS3 Design Premium about 2 years ago. And recently re-installed the system on my MacBook Pro(clean - install). It is running OS X 10.5.8. This is the message popped up after installing the CS3 Design Premium. When I try to open Acrobat.