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Flush or reset DNS on a Mac OS X El Capitan or Yosemite

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In order to flush or reset DNS on your mac computer running either OSX El Capitan or Yosemite, you’ll need to use the “Terminal” interface and a special command.

  • Open up the Terminal program by pressing Command+SpaceĀ (or find it under Utilities)
  • For 10.11 and 10.10.4
    • Enter “sudo dscacheutil -flushcache;sudo killall -HUP -mDNSResponder;say flushed”
    • Press enter key and then key in your password when prompted
    • When you hear “flushed” from the speakers you know it’s completed…
  • For 10.10., 10.10.1, 10.10.2, 10.10.3
    • Enter “sudo discoveryutil mdnsflushcache”

 

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