I do a lot of website work where I change nameservers for a domain, wait overnight for it to propagate on the host server, then go back to work on the site. Lately, what happens is that I can see the new site at the new location on my iPhone but not on my Mac (OS X 10.11.5), using any browser (Safari, FF, Chrome). This suggests I need to clear my DNS cache. I've tried two different Terminal commands for 10.11+:
sudo killall -HUP mDNSResponder #(from Apple Support)
sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
Then I restart OS X, empty browser caches, clear cookies. Nothing helps to get me to the new location, in any browser. But I can see it from my iPhone! This is maddening. Anybody know what I can do to get my Mac to recognize the new IP address for that nameserver?