When we try compiling it on a mac it works on that computer, but then if the file is uploaded to the internet then downloaded on another mac it doesn't work even though nothing should have changed.
Viewing post in Weiss Schwarz Simulator v0.6.0 comments
Also, found a thread where they have the exact same problem and maybe this can help. Im not really a programmer but it could have something to do with the CodeSigning. https://forum.unity.com/threads/the-application-cannot-be-opened.404388/