How To Clear Your DNS Cache on MAC OS

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Situatie

Overview

Your DNS cache stores the locations (IP addresses) of web servers that contain web pages which you have recently viewed. If the location of the web server changes before the entry in your DNS cache updates, you can no longer access the site.

If you encounter a large number of HTML 404 error codes, you may need to clear your DNS cache. After you clear your DNS cache, your computer will query nameservers for the new DNS information.

Solutie

MacOS® 10.10.4 and above

To clear your DNS cache if you use MacOS X version 10.10.4 or above, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Click Terminal.
  4. Run the following command:
    sudo killall -HUP mDNSResponder

    If the command succeeds, the system does not return any output.

    Warning:

    To run this command, you must know the computer’s administrator account password.

MacOS 10.10.1, 10.10.2, and 10.10.3

To clear your DNS cache if you use MacOS X version 10.10 through 10.10.3, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Click Terminal.
  4. Run the following command:
    sudo discoveryutil mdnsflushcache

    If the command succeeds, the system does not return any output.

    Warning:

    To run this command, you must know the computer’s administrator account password.

MacOS 10.7, 10.8, and 10.9

To clear your DNS cache if you use MacOS X version 10.7, 10.8, or 10.9, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Double-click Terminal.
  4. Run the following command:
    sudo killall -HUP mDNSResponder

    If the command succeeds, the system does not return any output.

    Warning:

    To run this command, you must know the computer’s administrator account password.

MacOS 10.5 and 10.6

To clear your DNS cache if you use MacOS X version 10.5 or 10.6, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Double-click Terminal.
  4. Run the following command:
    sudo dscacheutil -flushcache

    If the command succeeds, the system does not return any output.

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