Cannot share route via bluetooth with Mac

TTR420User
TTR420User Registered Users Posts: 13
Apprentice Traveler
In the past I would save the tracks created on my TomTom Rider 420 with my MacBook running Mavericks (OS X 10.9) via bluetooth. Everything worked.

I now have a new MacBook which is running Mojave (macOS 10.14). Everything goes okay, I can select my new laptop on the Choose a device screen, the receiving file dialog appears on the computer, and the track starts to download.

But after a few seconds the dialog disappears and the TomTom shows a big "X", the track was not shared, it could not be transmitted.

I could not see any reference to this problem either using a search engine or on this site so I am assuming it is not a common problem. Does anyone have any advice?