I have a Minolta 35mm MC macro; a 50mm MD macro, and a 100mm macro adapter that attaches to a lens to get macro abilities.
Will these work with a ring adapter on a Sony A6000?
It should. I'm using an MD-NEX adaptor with a Minolta MD lens and it works fine on my sony e-mount camera.
I'm told the MD and MC use the same mount. So as long as your macro tube is in the same mount, should be ok.