Comment by nbmh

For setting up a Mac, I can't recommend a .osx file highly enough. Dot files in general make setting up a new computer really easy, especially when combined with homebrew's cask. I've been able to setup a familiar dev environment on a new machine in less than 15 min because I've maintained dotfiles. It's a relatively small time investment upfront and the payoff can be massive, especially if anything ever goes wrong on your main machine.