@kas1e
The exact version of TGE I am working on is 1.4.2.
I am hoping at some point to be able to get 1.5.x, but I dont know if I am able to get it from Garage Games.
The current version of Torque 3D, will most likely not run on OS4. As far as I know it is based on a programmable graphics pipeline which OS4 does not have.
With regards to games an example of a game running on TGE would be this
http://www.torquepowered.com/products/thinktanks.
BUT actually porting this game or some of the other older GarageGames games, will ofcourse require some kind of licens.
Distributing the engine once it is done will also involve Garage Games and might not be possible at all, but I have not talked to Garage Games, so one never knows.