I loved it, but now there is a bad problem...

Ok, so before, it was my favorite game ever. Recently, (yesterday) it does not open… when i click on the icon to open it, it either opens up steam or does nothing. i have ®estarted my computer, uninstalled the game, but it does not seem to work. I am using an original macbook pro, and it used to work. PLEASE FIX!

SpeggyMerbles3 about RollerCoaster Tycoon® 3