Hi Banjokajoey,
Thank you for the purchase! Looks like it could be one of the two issues in the links below regarding OSX Security settings.
https://www.reddit.com/r/Unity3D/comments/5xfgy2/unity3d_osx_application_cant_be...
https://stackoverflow.com/questions/42488915/unity3d-osx-application-cant-be-ope...