http://osxdaily.com/2014/04/02/find-wi-fi-connection-speed-link-mac/ / Macintosh Apple fast wi-fi link speed Mac connection connected wireless router data Network Utility app bundled version Mac OS X fastest link speed interface Wi-Fi ethernet Network Utility system folder move Network Utility easy access use usage launch launching Spotlight tool link speed troubleshooting sluggish wifi connections optimize optimizing network channel network connection speed network interface Mac Wi-Fi wireless router link speed Command Spacebar Spotlight Network Utility Return key launch Network Utility Info tab network interface pulldown menu en0 en1 active wi-fi connection speed Link Speed megabits per second300 Mbit/s Network Utility panel interfaces vendor model protocols supported WiFi wi-fi card 802.11a b g n encryption OS X rather connection link speed maximum throughput particular network interface Internet network Internet connection speed computer command line app service SpeedTest /