Dns

2025

• Flush DNS on macOS Tahoe

  Dec 23

  While not normally required, you may in rare circumstances find it useful to flush the DNS cache on your Mac. For example, you might experience undesirable DNS settings which persist despite all efforts to remove them through conventional means.

  Flush DNS

  NOTE: An iPhone sharing cellular data via USB is being used as an example here. Replace “iPhone USB” as needed.

  sudo networksetup -setdnsservers "iPhone USB" Empty
  sudo dscacheutil -flushcache
  sudo killall -HUP mDNSResponder
  

  Verify DNS

  scutil --dns