Hello,
If you notice, under the File->Package Project menu, you have options for different platforms to package your game out to. You should be able to package your project for any of these platforms with minimal issues.
However, some platforms, such as iOS and Android, require special setup in order to get them working.
Here are our guides for Windows, Mac, and Android packaging:
Android: Android Quick Start | Unreal Engine Documentation
Windows: Packaging Projects | Unreal Engine Documentation
Mac/iOS: iOS Quick Start | Unreal Engine Documentation
However, keep in mind that in order to package onto a Mac, you’ll need to be developing your project on a Mac to avoid unnecessary headache.
Have a great day