Hello,
I've worked long and hard over the past two days to get the game working on Mac and launching properly, the good news is we're one step closer and the game should definitely launch now.
Essentially the game loses context when uploaded, however runs fine if extracted from a zip installer which the launcher options should now account for. SO...
Firstly:
Remove all of your game files, empty trash etc...
Redownload the game and run either install 1 or install 2 launch option
The game should then launch.
IF THAT STILL DOESN'T WORK.
Navigate to your steam directory and install directory and unzip RPGTycoon.zip.. That should plop RPGTycoon.app in the right place. Run that and bob should be your uncle.
Ideally, I'll look at seeing if I can get the game to unzip itself as soon as you download, but that's going to take a little time and I didn't want to leave you all out in the dark as you've all been so supportive. Again, apologies for any inconvenience but I hope that you stick with me as the game develops and hopefully grows thanks to all your support.
Cheers
Skatanic Studios