Resettare la Cache DNS
Dal Terminale MacOS 10.10 Yosemite 10.10.4 sudo killall -HUP mDNSResponder MacOS 10.10 Yosemite fino alla 10.10.3 sudo discoveryutil mdnsflushcache MacOS 10.9 Maverick dscacheutil -flushcache; sudo killall -HUP mDNSResponder MacOS 10.8 Mountain Lion e MacOS 10.7 Lion dscacheutil -flushcache sudo killall -HUP mDNSResponder MacOS 10.6 Snow Leopard e MacOS 10.5 Leopard sudo dscacheutil -flushcache