Tuesday, June 21, 2016

macOS 10.12 Sierra - Flush DNS

On macOS 10.12 Sierra, flushing DNS uses the same commands as 10.11 and previous.

To flush your DNS on macOS 10.12 Sierra, issue this command in terminal:

sudo dscacheutil -flushcache;sudo killall -HUP mDNSResponder;say flushed 
At the prompt, enter your password and hit the enter key. When it's done flushing your DNS, it will say so.  


  1. I have found this much more useful on 10.11 and 10.12

    sudo killall -9 mDNSResponder; sudo killall -9 dnsmasq

  2. Ozgo, with your version I get "No matching processes were found"

  3. Thanks worked like a champ, plus the SAY Flushed was fun.

  4. I am trying this on OS Sierra 10.12.2 I am still seeing two three items in the DNS folder. Is this normal after flushing?

  5. This comment has been removed by a blog administrator.

  6. If you need to view the cache on Sierra, check out the instructions here: https://stackengineer.com/macos/dns-troubleshooting.html

    sudo killall -INFO mDNSResponder
    It will dump the DNS cache into into the Console.

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