No miner for MacOS with External GPU connected?
I test other miners on macOS EGPU setting: it is stabler and better in hash-rate than on other OS. Please develop the miner on macOS with EGPU.
The hashrte is very similar between Windows version and Ubuntu one (if you have a clean Windows installation, of course) : just a litlte better with Ubuntu (and less power consumption).
I will be very surprised if a MacOS version will be better than the Ubuntu version... even more with an extrnal GPU.