Sims 3 Showtime mac installer problem [SOLVED]

The first time I tryed to open the sims 3 showtime installer for mac It opened then closed.
Then when I tried to open it again, it says it's damaged.


Please help, I really want to install so I can get the ultimate fix.



Kind regards,
     Calamity

The ultimate fix can work from Generation.

As for the problem of the installer being damage ... I would suggest you re try to make a disk image, and if it still doesn't work : redownload ?

Thank you! That worked perfectly!


Helper edit: Problem solved so topic is closed.
-Phoebe