How to change your localhost on Apple Mac OS X

Step by step guide

Find the Go to folder by navigating to GO in the Mac Top Toolbar>GO TO FOLDER.

copy and paste location into the box – /private/etc/hosts



A new folder will open, highlighting the host file.

Double click the file to open and insert the desired IP and website address under the broadcast host line and press control + y to save.

As shown below I have added "127.0.0.1 localhost.example.com" at the end of the file. 

Now we can access localhost as localhost.example.com from the browser

Reference: https://www.abitgooey.com/2018/08/change-your-localhost-mac/