Video Instructions Here

Gatekeeper, introduced in Mountain Lion (OS X 10.8), is designed to prevent potentially malicious apps from launching. When you attempt to launch an app that doesn't meet certain criteria, Gatekeeper will block the launch. To override this, explicitly right/control click the application and choose Open. To do this:

1. Download the .jar file for each sim you would like to use (or download all of them).
2. In Finder, right/control click the icon of the sim.
3. Select Open from the top of the contextual menu that appears.
4. Click Open in the dialog box. If prompted, enter an administrator name and password.

The Java and Flash versions of Plate Tectonics relies on advanced graphics libraries (LWJGL) that many OS and Java combinations don't support. This dialog shows up on all MacOS systems. Unfortunately at this time, the incompatibility problem is out of our hands. Unfortunately, there isn't a way to add MacOS compatibility without reprogramming the sim into HTML5.