OBS for Mac is out! It's early beta but it works pretty well so far.

https://obsproject.com/


OBS MultiPlatform is a complete rewrite of the original OBS from the ground up, with the main goals of course being multiplatform support, a more thorough feature set, and a much more powerful API. A very early and simple release is currently available for Mac.

OBS MultiPlatform will eventually support many of the advanced requested features not present in the original OBS, such as multiple stream outputs and scene previewing. It does not have these features in this release.