Hm... That is strange... I haven't heard from any other Mac users yet, so hopefully I can talk with the programmer about it tonight and we can figure out what went wrong here. Thanks so much for the report!
I'm not sure what the issue ultimately was, but by mixing around the content files with another Renpy game on my desktop, I got it working.
Amazing. 10/10. I love the range of options that you gave us. I also.. ugh I really love Silas. 10/10. I just want to know what was in that last left out content T.T But really- it was wonderful. And gosh darn it I love robots. <3 <3