It's not corrupted, you can get around it by right clicking, open. It's a very common issue with people downloading stuff here for the mac and not using Apple's own proprietary app store. They're trying to force people to use that, so they get a cut of
money.
https://osxdaily.com/2013/11/08/bypass-gatekeeper-mac-os-x-security-prefs/
Mac users are used to this, so you can still say you support mac. I know, I am one, and most mac apps not download on the Apple App store will say this.