Downloaded on mac, computer keeps telling me the file is damaged and wont open. Tried multiple times.

Oh no, sorry to hear that. I haven't got a mac anymore to check, but I know this is something I had many issues with.

You may want to google solutions for this specific error. There are a variety of strategies for getting around this issue with the platform, but I am fairly certain it is a security issue that can be resolved locally.

I'm getting this as well. Too bad, looks interesting.