$ ping abc
ping: cannot resolve abc: Unknown host

$ host abc
abc.local has address 192.168.1.128

$ ping abc.local
ping: cannot resolve abc.local: Unknown host

$ host abc.local
abc.local has address 192.168.1.128

sudo sed -i .orig '/ProgramArguments/,/</array>/ {
s/(<string>-launchd</string>)/1
                <string>-AlwaysAppendSearchDomains</string>/
}' /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

ps auxww | grep mDNSResponder