There are also available installers for WordPress Multisite User:Beltranrubo/BitNami_Multisite using different domains or subdomains. User:Beltranrubo/BitNami Free all-in-one installers for OS X, Windows and Linux.Installing WordPress Locally on Your Mac With MAMP.
specifically for working on multiple WordPress projects. Can 1 click install and upgrade WordPress and others as well.
Those interested in development should follow the instructions below and download WordPress locally. Installing WordPress locally is usually meant for the purpose of development.
Use these instruction for setting up a local server environment for testing and development.