[Rexxar]

reverse engineering != porting to an other platform

edit: but is it really open source as said by previous comment or is it just an SDK ?

[mcintyre1994]

It's closed source. This project uses an open source implementation he wrote himself: https://github.com/insidegui/ChromeCastCore

> This framework implements the Google Cast APIs so they can be used in macOS apps. Google provides an official SDK but it is only for iOS and closed source.