drupalvm

If you have to go for a Drupal core update from a previous install based on composer_manager or drush (both deprecated), consider installing something robust, Composer friendly, that excludes vendor and core for a lightweight repository and enables CI and automation tools like Phing, Behat, PHPUnit, CodeSniffer, ...

If you don't have Drupal VM installed, head to the documentation.

Drupal 8 evolves quickly, and it's easy to get lost amongst the several documentations that have been written since the beta releases, Drush and PHP version needs upgrade. Some things that I have learned.

Option 1 : No VM setup on Mac OSX, via Homebrew

Okay, VM's are easier to maintain solutions, but in some situations you just don't have enough RAM for having Virtualbox running all the time.