Flush DNS

Flush the DNS cache

Works for macOS 10.6+ and Windows

macOS Cache Coverage

On modern macOS, Flush DNS clears both OS-level host-resolution caches:

• /usr/bin/dscacheutil -flushcache clears the Directory Service/libinfo cache.
• /usr/bin/killall -HUP mDNSResponder purges the separate mDNSResponder DNS-reply cache.

Browsers and other applications may maintain additional caches that this extension does not clear.

Authenticate with Touch ID on macOS

Flushing the macOS caches requires administrator privileges. Flush DNS uses Touch ID when sudo is configured with the pam_tid.so PAM module. This configuration applies to sudo globally, not only to Raycast.

macOS Sonoma (14) and Later

1. Copy Apple's local sudo template:

   sudo cp /etc/pam.d/sudo_local.template /etc/pam.d/sudo_local
   

2. Uncomment this line in /etc/pam.d/sudo_local:

   auth       sufficient     pam_tid.so
   

macOS Ventura (13) and Earlier

Add this line to the auth entries in /etc/pam.d/sudo:

auth       sufficient     pam_tid.so

macOS updates may overwrite /etc/pam.d/sudo. If Touch ID is unavailable or not enabled for sudo, Flush DNS retains the existing administrator password prompt. Cancelling or failing a Touch ID attempt stops the flush instead of opening a second password prompt.