Hmmmm, what version of OS X are you running? That is quite odd saying as CS6 should run on anything from 10.6.8 on up... do you have something earlier than that perhaps?
Also, what precise version of After Effects are you running? 11.0.4? If not, run your update.
Jason is right. You must have the 11.0.4 update to run CS6 on Yosemite or Mavericks.