Mac OSX build from a Windows machine won't play on mac

Hi, I have a Win7 PC and built a version of my game for my brother’s Mac OSX (using Universal platform). He downloaded, unzipped and tried to open the game but his computer did not respond. Could something be wrong with the build?

I know its a bit late, but just ran into this issue and after a bit of searching found out you need to zip up the mac build before transferring to your mac :confused:

Not sure if this is an issue on Unity’s or Apple’s end but whatever, it works.

A windows PC cannot build a Mac project. It doesn’t have xCode or apple’s libraries.