Apple: How to Flush DNS Cache in macOS, El Capitan, or Yosemite

If you are a network administrator, web developer, or Mac system administrator, you may have to flush the DNS cache macOS for several reass. Especially, if you want a name server to resolve correctly or change a DNS address to detect by your individual system.

In additi to the above reass, if you have modified the file / etc / hosts and you need the changes to take effect less the restart of the Mac, then you may need to flush and reset DNS caches.

How to Clear the DNS Cache Mac [19659005] The DNS cache reset is not the same in every versi of Mac OS X. If you are a Mac user for a lger period, you can know that this process in OS X Yosemite is similar to some other older versis. This is probably because Discoveryd replaces mDNSRespder, and then returns to mDNSRespder again.

Despite the change, emptying the DNS cache remains a terminal drive in Yosemite, but there is a small difference depending the exact versi of the operating system you are using.
You can delete DNS Unicast or DNS Multicast, or both. If you attempt to reset all DNS caches the Mac, you may need to remove both caches as an appropriate acti.