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

It is prohibiting the opening of Eclipse app because it was not registered with Apple by an identified developer. This is a security feature, however, you can override the security setting and open the app by doing the following:

1. Locate the Eclipse.app (eclipse/Eclipse.app) in Finder. (Make sure you use Finder so that you can perform the subsequent steps.)
2. Press the Control key and then click the Eclipse.app icon.
3. Choose Open from the shortcut menu.
4. Click the Open button when the alert window appears.

The last step will add an exception for Eclipse to your security settings and now you will be able to open it without any warnings.

Note, these steps work for other *.app apps that may encounter the same issue.