App can't be opened because it is from an unidentified developer

Question

I installed Mac OS X Mavericks (10.9) yesterday and since then I am not able to start my Eclipse. I am attaching a screenshot of the message I see.

Is there a workar

Answer 1

Terminal type:

Last login: Thu Dec 20 08:28:43 on console
 ~  sudo spctl --master-disable
Password:
 ~  spctl --status
assessments disabled
 ~ 

System Preferences->Security & Privacy