Problems using AirDrop between an iMac 2017 and an iMac late 2009
I have an iMac 27" from 2017, running Ventura 13.6 while my wife has an iMac late 2009, running High Sierra 10.13.6. We're connected to the same network and Bluetooth is activated on both. Still, I can't see her machine on AirDrop and as far as I can see, there is no way to check if all or only contacts are allowed, because there is no Control Center and nothing in Sys Prefs, so what is wrong? I can't see my machine on her AirDrop, either and my AirDrop is set to all.
iMac