In regards to the Mac version problems people are having here is what I've found. I'm not a mac person so this may be off base but what my research shows me is that the Mac adds a quarantine attribute to downloaded files (like the zip archive) to mark it as potentially unsafe. When the zip file is automatically opened (by the download process for example) that quarantine attribute gets applied to everything in the archive and it goes through more strict checks. The validation checks are more aggressive. Because the code is unsigned, this is why MacOS is claiming that it's damaged (it isn't). If you manually unzip the archive to a location (open with -> archive utility) and remove the quarantine flags it should work.
xattr -dr com.apple.quarantine /path/to/lackey.app