It's no StreamControl, but you can use ScoreBoard Editor in PlayOnMac (Wine) to at least get some form of a scoreboard for now.
ScoreBoard Editor with OBS thread:
https://obsproject.com/forum/resources/sbe-scoreboard-edit.83/
PlayOn Mac:
www.playonmac.com (or something else that uses WINE).
SBE will only edit FreeType (Text) fields so you'll need to supply your own background images.
But, yes - we need a minimum of SBE's features built in to OBS. As a longer goal, get the functionality of StarBoard SC2 as a multi-platform plugin. I know some people over in the Windows forms seem to be trying to get it to work.