Reset DNS Cache on macOS High Sierra

Check tutorial of How to Reset DNS Cache in macOS High Sierra

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Do you need to reset and clear the DNS cache in macOS High Sierra? Some Mac users occasionally need to reset their local DNS cache, usually because the Mac’s DNS settings have changed or a particular name server or domain is cached and they need to flush the existing DNS cache.

While it is usually web developers, system administrators and network administrators who play with DNS and need to reset and clear their DNS caches, other Mac users sometimes need to clear the DNS caches as well.

In macOS High Sierra, you can reset the DNS cache by targeting the mDNSResponder process from the command line available in the Terminal app. This is similar to clearing the DNS cache in macOS Sierra and El Capitan, although the process of resetting the DNS cache has changed many times in the history of the Mac OS and Mac OS X operating system.

How to Reset DNS cache in macOS High Sierra

Keep in mind that resetting and flushing the DNS cache will likely interrupt any active internet activity or use.

  1. Launch the Terminal application, located in the / Applications / Utilities / folder on a Mac
  2. Flushing the DNS cache is done through Terminal in macOS

  3. Enter the following syntax at the command line:
  4. sudo killall -HUP mDNSResponder; sleep 2; echo macOS DNS Cache Reset | say

  5. Press the Return key and then enter the administrator password and press Return again
  6. Reset DNS cache in macOS High Sierra

  7. Wait a moment, when you see the text “macOS DNS Cache Reset” appear in Terminal, the DNS cache reset was successful
  8. Exit Terminal

You may need to close and restart certain Internet-connected applications for the changes to take effect, although a simple refresh is sufficient for most web browsers.

If the above approach doesn’t work for some reason, you can split the command syntax into smaller components:

sudo killall -HUP mDNSResponder && echo macOS DNS Cache Reset

This applies to macOS High Sierra, which is used as version Mac OS 10.13.x. Users interested in learning how to reset DNS cache in earlier versions of macOS can learn how to do this for Sierra, El Capitan, Yosemite and earlier versions of Mac OS X if desired.

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How to Reset DNS Cache in macOS High Sierra: FAQ

Tutorial Summary: How to Reset DNS Cache in macOS High Sierra


In this guide, we told you about How to Reset DNS Cache in macOS High Sierra; please read all steps so that you understand How to Reset DNS Cache in macOS High Sierra in case if you need any assistance from us, then contact us.

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What is actual time in which this method complete?


The time to complete the How to Reset DNS Cache in macOS High Sierra tutorial is 10+ minutes.

What are the supported Device?


Apple

What are the supported Operating system?


mac OS



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