There are a number of things to look at 1) Airdrop goes and scans for peers periodically and borks wifi. Try ifconfig awdl0 down. See https://news.ycombinat

There are a number of things to look at 1) Airdrop goes and scans for peers periodically and borks wifi. Try ifconfig awdl0 down. See https://news.ycombinator.com/item?id=31706283 https://news.ycombinator.com/item?id=31706283 2) Try separating your 2.4 and 5GHz networks and locking the mac to the 5GHz. I've got the same SSID for 2.4 and 5GHz and I've seen my MBP cling to my crappy 2.4GHz network because it has a stronger signal, but much wonkier performance. There is apparently no way to just disable the 2.4GHz radio on a mac! 3) My partner was having a problem where she'd loose wifi connectivity on her mbp every hour. It turns out that some security protocol on wifi does a re-key every N minutes. This is supposed to be seamless, but my partner's ISP provided wifi AP did something that made the mac loose connectivity on re-key until she disabled and re-enabled wifi. I proved this was the problem by changing the re-key interval on the router. We "solved" this by replacing her router. This had the advantage of getting her much cleaner spectrum, since the ISP provided routers don't use DFS, so all the APs around her were clogging the same few 5GHz channels. Between fixing the re-key issue and the DFS, her wifi got much, much better. Also, in addition to speedtest / fast.com, etc, I'd suggest using https://packetlosstest.com/ https://packetlosstest.com/. Seeing spikes of latency over 1-2 seconds brings home problems like crowded channels, or the airdrop scanning. Happy hunting!