I was using imgburn with wine on my Mac for a while and while it worked to make ISOs, it wasn’t able to find my disc drive. I tend to just make the disc image in tsmuxer or imgburn and burn it with the OSX disk utility. When I first got my external blu-ray burner it was failing every time so I would bring the ISOs over to an old Windows laptop and use the software that came with the drive, but I updated the software on my Mac semi-recently and since then disk utility handles blu-ray just fine.