I have photoshop and illustrator software, as well as a program called traktor, that I am trying to install on my MacBook. However, upon each attempt, a dialogue box appears warning me that there are no default applications to run the program. Someone told me that I should use Vise X, but, beyond downloading it, I have no clue what to do. What do I do? Any help - even a "give up, it won't work" - would be appreciated.