Tutorial on how to use vhosts & MAMP, full post available at @ https://christianvarga.com/vhosts-and-mamp/

hosts

127.0.0.1 project1.localhost
127.0.0.1 project2.localhost

httpd-vhosts.conf

# Enables localhost/project-name to be used, if you want.
<VirtualHost *>
  DocumentRoot "/Users/your-username/sites/"
  ServerName localhost
</VirtualHost>

# vhosts for each project
<VirtualHost *>
  DocumentRoot "/Users/your-username/sites/project1/"
  ServerName project1.localhost
</VirtualHost>

<VirtualHost *>
  DocumentRoot "/Users/your-username/sites/project2/"
  ServerName project2.localhost
</VirtualHost>

httpd.conf-1

# Virtual hosts
#Include /Applications/MAMP/conf/apache/extra/httpd-vhosts.conf

httpd.conf-2

# Virtual hosts
Include /Applications/MAMP/conf/apache/extra/httpd-vhosts.conf

httpd.conf-3

# Alias /favicon.ico "/Applications/MAMP/bin/favicon.ico"
# Alias /icons/ "/Applications/MAMP/Library/icons/"