User blog comment:Buddyfight Unified Universe/MAC Port of 0.97.1 Uploading Now, Link to Follow/@comment-27326589-20160508074756/@comment-26290163-20160508080129

That's your Mac's Security System if it's showing that when you try to open it. Unless you change settings, you will always get this from certain apps that are downloaded, but here is how to quickly bypass that. =OS X Yosemite: Open an app from an unidentified developer= If you try to open an app that is not registered with Apple by an identified developer you get a warning dialog. This doesn’t necessarily mean that something’s wrong with the app. For example, some apps were written before developer ID registration began. However, the app has not been reviewed, and OS X can’t check whether the app has been modified or broken since it was released.

A common way to distribute malware is to take an innocent app and insert harmful code into it, and then redistribute the infected app.

The safest approach is to look for a later version of the app from the Mac App Store or look for an alternative app.

To override your security settings and open the app anyway:
 * 1) In the Finder, locate the app you want to open.

Don’t use Launchpad to do this. Launchpad doesn’t allow you to access the shortcut menu.
 * 1) Press the Control key, then click the app icon, then choose Open from the shortcut menu.
 * 2) Click Open.

The app is saved as an exception to your security settings, and you can open it in the future by double-clicking it just as you can any registered app. To change your security settings, see, Protect your Mac from malware.