Check your network speed
Worried your internet connection isn’t up to speed? Install SpeedTest (for Mac, iOS and tvOS) from the App Store that will give your connection’s upload and download speeds a thorough workout. It’s worth carrying out this test at different times of the day.
You can also check your current local network speed by opening Network Utility (type its name in Spotlight) and switching to its Info tab. Select ‘Ethernet (en0)’ for your wired connection — the link speed should be 1Gbit/s; if not, check the cables and verify your router supports a fast Gigabit Ethernet connection. Select ‘Wi-Fi (en1)’ to check your wireless connection. A strong 2.4GHz signal should deliver at least 200Mbps, while a 5GHz one should deliver at least 350Mbps. Also try the free HELIOS LanTest tool ( bit.
ly/heliostest) — you’ll need the username and password shown on that page to get it, and to use System Preferences’ Security & Privacy to allow the app to be installed. Speedtest can help you determine the actual speed you’re getting from your internet connection.