I ran the betas of macOS Sierra without incident but recently began experiencing random wi-fi drops with the GM. When I was connected to wi-fi the speeds were unusably slow.
I took the usual troubleshooting steps of toggling wi-fi off and on, restarting the machine, creating a new location in Network Preferences – even manually configuring DNS to use Google’s public servers. Nothing worked. Then I ran across this article at OSXDaily.com that suggested specifying a lower custom MTU setting of 1453. That seems to have done the trick.
Here are the steps I took that fixed my wi-fi issues (see the full article for additional troubleshooting steps): Continue reading “MacOS Sierra Wi-Fi Fix”