Check your version
This tutorial covers a topic in Drupal 7 which may or may not be the version you're using. We're keeping this tutorial online as a courtesy to users of Drupal 7, but we consider it archived.
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Sprout Video
This video shows you how to download and do the initial setup of MAMP, which is Apache, MySQL and PHP for Macintosh. It shows some basic configuration tweaks to change the port from 8888 to the default of 80 so that you can just visit the localhost in the browser and get your Drupal installation to appear. It also provides a general orientation to MAMP, and some other initial configuration setting changes.
Next up: MAMP Server Configuration
Additional resources
More information on Development Environments