Until now I used ‘dscacheutil -flushcache’ to flush my cache.. When one develops sites the cache is the time consuming factor in this flow. However.. it did not work anymore. Although, not fast enough for me, so I was looking and found the following command on the apple site itself (rtfm ? ) :
sudo killall -HUP mDNSResponder
This one worked like a charm.. Please update your development hours with this 1 command.