Sorry it's not working right! Does it give you a specific error message?
Sadly no. It just says "Cannot be opened." I don't even get the security thing, where I need to approve it. :/ If you need any diagnostics, I can look if I find them.
Wouldn't hurt, if it's not too much trouble! I just borrowed a MacBook so I can test it out, and hopefully have this figured out within a couple days!