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How to Flush DNS Cache in Apple Mac OSX Leopard

Many of you might not know that beside Microsoft Windows has DNS caching, Apple Mac OSX Leopard does too. In order to flush the cached DNS in your Apple Mac OSX Leopard and get the latest resolve value, you can do this in your Mac Terminal.

Flush Cached DNS

In your shell, type;


dscacheutil -flushcache

To see the caching statistic on your machine, type;


dscacheutil -statistics

This command doesn’t required sudo privilege cause it’s flush base on user’s cache statistic.

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This entry was posted on Tuesday, June 24th, 2008 at 1:33 pm and is filed under Systems. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

3 Responses to “How to Flush DNS Cache in Apple Mac OSX Leopard”

  1. Ben Margolin Says:
    September 1st, 2008 at 12:10 pm

    This doesn’t seem to actually work (the flush) for me. It seems like it should, and the manpage seems to imply it will, but I’ve got a bad IP address in my cache due to a bad /etc/hosts entry, and it’s still stuck there, even after removing, or correcting, it in the hosts file.

  2. Ben Margolin Says:
    September 1st, 2008 at 12:10 pm

    This doesn’t seem to actually work (the flush) for me. It seems like it should, and the manpage seems to imply it will, but I’ve got a bad IP address in my cache due to a bad /etc/hosts entry, and it’s still stuck there, even after removing, or correcting, it in the hosts file.

  3. Flush DNS Says:
    September 20th, 2009 at 9:18 am

    Another useful way of flushing the dns is by running “lookupd -flushcache” which should work on earlier versions of OS X.

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