No mouse input on Mac

On Mac OSX 10.6.8 using Xcode 3.2.5 and Torque2D Pro 1.7.6, we have no mouse input coming through in the game. Game starts windowed mode, splash screens shows, music plays, titlescreen is shown, mouse cursor is shown, but when the game requires you to click on the title screen, nothing happens on the click.
The game is an already released PC game, to be released on Mac Store.

Any help is much appreciated!