Hi all I'm currently renting an self contained annexe room and getting my internet via wifi from the house owners hub/router in his office across the hallway. At first my Mac Pro / Sierra had a bit of trouble getting a decent connection but it settled down after a day or two. Over the coming weeks the signal strength varied, mostly full bars were indicated but the connection was patchy. It kept getting stuck and eventually I had to continuously turn wifi on and off to get it back, like every 2 minutes. I suspect the hub is being used by other residents too. In situations like this it's easy to blame the internet provider / hub, but after a little bit of research on how to boost my signal I decided to try a wifi diagnostics. It requested my password and then I assume went about its business, (there was no explanation, panel, etc). After a few minutes my internet was super, super fast and the connection has been good / stable since. I'm obviously not complaining, and I know nothing about wifi, but what exactly has gone on here? Has diagnostics affected this change, chosen / tapped into another channel for example? I'm just curious for future reference, or in case the connection fades out again. Cheers.