Mac demo not working

[mooncookies]

I'm downloading it off Hanako's website but when I try to open it it just says that the file is damaged and I should trash it D: Has anyone else had this problem? I really wanna try this game!

[hanako]

That 'error' is the message Gatekeeper gives you when it has automatically deleted files because they weren't downloaded from somewhere it recognises, like the app store.

If you do a websearch for gatekeeper and "file is damaged" you'll see a bunch of people talking about this and instructions on how to temporarily disable that feature... but it will automatically turn itself back on again in a month.