Need help preventing the screensaver on a Mac

Every answer related to this seems to be for handheld devices, which can use SleepTimeout.NeverSleep, but I need to prevent the screensaver on a Mac running OSX (using C#). If there is not a more straightforward solution, is there a way to have the game fake jiggling the mouse every so often? This is only when players are using controllers.

This answer describes it as a bug, but offers no solution.

Upgrading to Unity 5 appears to have solved this, although a Unity 4 solution would still be appreciated.