It depends on what kind of work you are doing, but for me this is not true. I need to do a lot of unix-ish development, so that means installing XCode (OK), installing Homebrew (or MacPorts or Fink and finding out which one is better), Sublime (or emacs or vi), a bunch of other tools. I need a week or so until I get it where I want it. This is not too different from my experience on Linux or Windows. Installing Linux is the easiest part - in fact, in most workplaces, you just give it to the IT department and they do it for you in a couple of hours.