@Carl I implemented your suggestion (5 GHz only Guest network) yesterday morning and the MacBook Air has successfully been joining the Deco Guest Network for the past 1.5 days. I think it has...

@Tony This is similar to a new thread I just posted. Except for my new Deco M9 Plus install, I created a brand new network SSID and a new password. Then I connected all 19 devices to the new network....

This past weekend I installed my brand new 3-station Deco M9 plus (single-story home, ~1700 square feet) and it was super easy and has been great. The signal covers my entire property and the speeds...