Yes and no. I use OS X for my main machine, and can happily deploy something to a server running 'not OS X' and be confident that all libraries and dependencie

Yes and no. I use OS X for my main machine, and can happily deploy something to a server running 'not OS X' and be confident that all libraries and dependencies are exactly the same in production as what I was using in development. Sure Docker is running through a stripped down VM on the Mac, and so technically it's "the same OS my server uses", except it's abstracted away so that for all intents and purposes I'm using OS X for development (and email, browsing, and other things) and deploying hassle free to Linux.