Usage (Free) Usage is a menu bar app that comes with cool customizable popover widgets and advanced features to track your system’s performance, processor, disk usage, network activity, and memory pressure among others. (I personally haven't used it but I heard it's good). Source: over 1 year ago

For starters, disconnect all wireless devices (or just your wireless router if it’s separate from your modem). Hardwire your modem to a computer and use Ookla Speedtest instead of Spectrum’s. Source: 6 months ago

Websites like speedtest.net, fast.com and etc do provide measurement in megabits, and even with that, speedtest.net provides it between you and your ISP(mostly) only. So if you want to download something from lets say, YouTube, the speed will be slightly different because now you're connecting to Google's server, not your ISP's server. This is because speedtest.net has partnership with ISPs so that speedtest.net... Source: 6 months ago

If fast.com and speedtest.net are fast, then it's not the computer or your internet. Source: 6 months ago

Hi there. I definitely understand the frustration with slow download speeds. Are you able to run a speed test on speedtest.net to see what results you are getting on that computer? Are you having slow speeds on all devices or just this computer particularly? ^David. Source: 6 months ago

What about the speedtest.net cli version in combination with a little script? Source: 6 months ago