Comment by saagarjha

There’s a ton of things on macOS that just randomly start network scans and just destroy Wi-Fi performance. I helped Martin find on in the post, but personally I dealt with another one for several months on my own computer and eventually just gave up. I just went ahead and rewired my house with MoCA and now I get the speeds I was looking for, continuously and without the hassle, whenever I’m at my desk. I’d recommend everyone else to do the same, honestly. (Unless you’re at Apple. Then you should not do this and instead send in Radars when your network performance drops.)