DNS request are usually cached, that’s good as it help to speeds up the lookups within the same host but sometimes we will want to clear the cache so it don’t hold the values that are no longer valid. To clear DNS cache in Mac OSX, we can do it with the help of Terminal.
Mac OSX 10.4 And Below
Open up the application called “Terminal”
lookupd -flushcache
Mac OSX 10.5 And Above
Open up the application called “Terminal”
dscacheutil -flushcache
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