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How to Flush your DNS Cache on macOS Big Sur

Learn how to easily flush/clear your DNS cache on macOS Big Sur

Created on Jul 30, 2021

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To clear the DNS cache on macOS Big Sur, you can open up the "Terminal" app and run the command below.
run sudo killall -HUP mDNSResponder

Other commands for other macOS versions.
  • In macOS El Capitan or newer
    • sudo killall -HUP mDNSResponder
  • For macOS Yosemite
    • sudo discoveryutil udnsflushcaches
  • In macOS Lion, Mountain Lion, and Mavericks
    • sudo killall -HUP mDNSResponder
  • In macOS Snow Leopard
    • sudo dscacheutil –flushcache
  • For macOS Leopard
    • run sudo lookupd –flushcache
  • And in macOS Tiger
    • lookupd –flushcache

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