My work computer is a 2019 Retina iMac (Intel). It has been used only by myself and my coworker, each with our own user accounts that are password protected. My account is the administrator. This was ...

So, I have a shiny new iMac, just a few weeks old. On two separate occasions, I've woken it up from sleep to find that it doesn't detect a single WiFi network. There are a half dozen around, two of ...