How to clear the DNS Cache on your macOS?

Overview 
 
This article provides instructions on how to clear the DNS Cache on a computers and web browsers. This procedure is necessary in order for previously cached resolutions to be cleared out and subsequent lookup to be performed based on newly configured DNS settings.

 

OS X 10.4 TIGER

 

Click the Terminal icon in the dock or in Finder under Application/Utilities/Terminal

     Run the following command in the command line and hit enter
 
lookupd -flushcache

 
 

OS X 10.5 and 10.6 LEOPARD

 

Click the Terminal icon in the dock or in Finder under Application/Utilities/Terminal

     Run the following command in the command line and hit enter

dscacheutil -flushcache

  

OS X 10.7 and 10.8 Lion

 

Click the Terminal icon in the dock or in Finder under Application/Utilities/Terminal


sudo killall -HUP mDNSResponder

 


 

OS X 10.9 and 10.10.4 Yosemite, 10.11 El Capitan and 10.12 Sierra

 

Click the Terminal icon in the dock or in Finder under Application/Utilities/Terminal




sudo dscacheutil -flushcache

sudo killall -HUP mDNSResponder