Thomas Tempelmann: Some of my older Macs running High Sierra or Mojave were unable to join the Personal Hotspot of one or even two of my iPhones.[…]There is a file called com.apple.airport.preferences.plist in the folder /Library/Preferences/SystemConfiguration.[…]Delete this file. But that will also reset all your network interfaces[…][…]If you’re more adept, edit the file, e.g. with […]