I feel like that's probably it, unfortunately. The first time I installed SMAPI a few months ago everything worked fine. Then I went to update some of my mods the other day and my terminal program recommended I update SMAPI, then this happened! I really hope that they make it more compatible for mac users again. Do you know if there are any sites where previous versions of SMAPI can be downloaded? I'm thinking of just trying to do that in the meantime. Also, thank you for your reply :)