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Flushing DNS Cache on macOS 13 Ventura

Yosemite

This morning I needed to flush the DNS cache on my MacBook Pro, and so I looked it up, and wanted to keep it around, so here we are. 🙂 The problem was that a service I use had to change DNS mapping due to a change in Google Cloud, and the nature of DNS caching is to try and minimize the hits on the DNS Servers, but this makes it hard to "forget" a DNS entry... unless you flush the cache.

It's really not all that hard:

  $ sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

and after this, the DNS cache is empty, and all services will hit the DNS server for the IP addresses, and everything will detect the "move".

This entry was posted on Saturday, November 12th, 2022 at 7:21 am and is filed under Apple, Coding. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.