[nickstinemates]

That sounds like a difficult proposition without your target being able to run Mac binaries.

Having some sort of translation that's not a VM as a part of the distribution mechanism doesn't make much sense, and breaking the portability of Docker comes at a significant cost.

I struggle to see how to make that work cleanly.

[nknighthb]

I think you're interpreting his words too literally. Nothing that gets deployed to a QA/staging/production system should be built on a developer's workstation in the first place, those specific containers need to come off a build server. The binaries on the developer's workstation would be built on/for OS X, and the binaries in QA/staging/production on the (Linux) build server for (Linux) targets.