Upgrading will be different for everyone, but there are three fantastic resources I can recommend to help get started.
There's also the official 7.1 migration guide - but remember its still a work in progress as a beta release.
mac OS is the operating system that powers every Mac.
It lets you do things you simply can’t with other computers.
There's rarely a quiet night in with me, tonight I upgraded my local box to PHP7 (so I don't need to use VM's or docker containers).
Took about 10 minutes on my internet connection so there's time to grab a coffee while it downloads!
Option #2 My preferred method is to just install via Homebrew.