Ask HN: Getting started with Mac for Linux users

What are some good resources for a Linux user (moderately advanced) switching to Mac? Things I am looking for : keyboard shortcuts, package management, getting a Linux-like dev environment for open-source development, apps like Spectacle, some basic window management. All the articles I've found so far are great for existing Mac users trying to pick up a new trick or two, but none well-organized enough for a newbie to follow as a step-by-step guide.