Hello Grant Bennet-Alder,
Thanks for your help!
Answers to your questions:
1- I indeed did the trick of switching off the Bluetooth on my iPhone: that didn't help
2- Hearing aids: 2 chargeable AudioNova devices from 2024
3- MacBook Pro,Retina 13 inch, early 2015
Until recently, hearing aids and MacBook paired automatically and could be seen on the BlueTooth list!!!
But now, the hearing aids are disappeared out of the BlueTooth list, but under all the devices, that are still mentioned in this list, is written: "no connection"
I went to the hearing-aid shop and they tried hard to pair and connect, but they didn't succeed and advised me to go to the local Apple dealer: they tried very hard to find a solution, but also their efforts were not successful.
Apple Support adviced me to buy a new MacBook with "M" chips, but that is at the moment "a bridge too far".
My idea: perhaps a recent update is blocking BlueTooth through some new safety measures or perhaps I did activate a block on the BlueTooth myself?