Question: how to do ipconfig /flushdns on mac?
Answer: Step 1: Open the Terminal. Navigate to Applications -> Utilities -> Terminal.
Step 2: Flush DNS - Type the following command and hit enter. Mac OS X Yosemite and later. sudo killall -HUP mDNSResponder. Mac OS X Yosemite v10.10 through v10.10.3. sudo discoveryutil mdnsflushcache.