So I know like absolutely nothing abt coding n jazz, but I had the same issue. Looking stuff up I found that you can set the renpy platform with "export RENPY_PLATFORM=linux-x86_64" so then I put in ./DDLC.sh it says I have an "Exec format error"... okay. I set the platform to the i686 one and I just get "Permission denied" (after running the ddlc.sh thing again)... okay. I set the platform to the darwin one and I get... some long error about not having the platform files. I don't currently feel like downloading more files so someone else can try the darwin stuff, but anyways this as already pushed my pea-brain so far so I hope this helps someone else :3