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Topics for particular software or systems: Start your topic link with the name of the application or system.
For example “MacOS X – Your question“, or “MS Word – Your Tip or Trick“.
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OS X, like Windows, Linux and other Operating Systems, keeps a local cache of resolved DNS queries for a time defined by the DNS server. Sometimes it might be necessary to reset the cache immediately and re-query a DNS server. For example, you might need to do this if you are a network or server administrator and an entry on your DNS server has recently changed.
sudo killall -HUP mDNSResponder
Use the following Terminal command to reset the DNS cache in OS X Yosemite v10.10 through v10.10.3:
sudo discoveryutil mdnsflushcache
sudo killall -HUP mDNSResponder
Mac OS X v10.6
sudo dscacheutil -flushcache
