Just thought of another option, the game is pretty big so it’s probably taking up a fairly large chunk of your hard drive space.
I haven’t used one of these programs on a mac before so I have no idea how well they work but I use and old version of SpaceMonger on my computer to free up space. It’s creates a visual representation of the drive so it’s easy to see the large folders.
After a quick google, the first result is GrandPerspective for mac. Looks like it’s free on SourceForge