Trying to run on Mavericks but every time I try to run it, it pops up with a window that says it can't be opened because the identity of the developer cannot be confirmed. Anyone know what I could be doing wrong or any possible fix for this problem?

To get around this issue, please right-click (or Ctrl-click) the game and select "Open". This should only be required once, and in the future the game should launch normally

It's from the support page -
http://www.gog.com/support/support_view/os_x_1095_cant_be_opened_because_the_identity_of_the_developer_cannot_be_confirmed_error_message