iMac (Retina 4K, 21.5-inch, Late 2015)
I have a WiFi setup that allows me to choose either the 2.4 or 5G channels on my TimeCapsule, and I also have two devices that use their own WiFi networks connecting to the router wirelessly: a Tesla backup battery and an Aquanta hot water system monitoring device. When I click the WiFi icon in MacOS I see a list of all four of these options with the selected network checked.
Recently, when waking from sleep my system seems to reselect which WiFi network to use, which I only discover because it has chosen either the Tesla or Aquanta network and some app is not connecting to the Internet. (I don’t know if this is related to the most recent MacOS 10.14 updates, because I don’t recall when it started happening.)
The Tesla and Aquanta devices need to connect to the Internet themselves to operate properly, but they do not set up WiFi for other devices to use, so I can’t just uncheck the “Automatically join this network” option in Network Preferences.
Does anyone here have experience with multiply WiFi networks running at the same location and know how to tell MacOS which one to use all the time?