How Can I Package for both Mac and Windows?

I have recently made a game called Physics Playground:

And I want to publish it to steam for Both Mac and Windows, How do I do it?


You’ll need to package on a Windows machine for Windows and a Mac machine for Mac because the toolchain isn’t updated yet. We’re working on correcting this for the future, but there isn’t a 2 in 1 at this time.


Using copy project to another platform will solve this issue properly without any error in packaging?

Yes, you should be able to switch the project between platforms. If you’re using a Code project, you might need to work in XCode or Visual Studio accordingly to make sure the project is updated for each platform.

Is this still not possible in 2019? How can that be? That is so f*cking annoying. How is this not one of the top priorities.