I think if people really want something like docker on Windows or MacOSX, they should go out and write themselves one. For docker guys, obviously, they don't find it an attractive market.
Who will run MacOSX in server farms anyway? If you're using Windows already, why not spend more for some fancy virtualization or container like products, say from VMWare?
Mono is more like a different implementation of interesting languages. If you like C#, you can use mono to write and run on Linux. If you want to write Windows programs, you won't use mono.
We actually do support Docker on OSX and Windows :) It just requires a small gateway VM called boot2docker (25MB on disk). It's perfect for development of Linux application on an OSX machine. Typing "docker build" and "docker run" straight from the Mac terminal is pretty magical, you definitely forget there is a VM involved.
The boot2docker devs had made it clear they're not going to add any vbox-specific bits to b2d, but I've been successfully using the ISO linked from this article (which I expect will get updated to 1.1 shortly, or if not there's instructions to build your own):
Who will run MacOSX in server farms anyway? If you're using Windows already, why not spend more for some fancy virtualization or container like products, say from VMWare?
Mono is more like a different implementation of interesting languages. If you like C#, you can use mono to write and run on Linux. If you want to write Windows programs, you won't use mono.